Bump version and soname for 5.2.4.

In C++11, the `throw()` specifier is deprecated and `noexcept` is
preffered instead.

COPYING

@@ -47,7 +47,7 @@ XZ Utils Licensing
     naturally it is not legally required. Here is an example of a good
     notice to put into "about box" or into documentation:
 
-        This software includes code from XZ Utils <http://tukaani.org/xz/>.
+        This software includes code from XZ Utils <https://tukaani.org/xz/>.
 
     The following license texts are included in the following files:
       - COPYING.LGPLv2.1: GNU Lesser General Public License version 2.1

ChangeLog

@@ -1,6 +1,6 @@
 See the commit log in the git repository:
 
-    git clone http://git.tukaani.org/xz.git
+    git clone https://git.tukaani.org/xz.git
 
 Note that "make dist" doesn't put this tiny file into the package.
 Instead, the git commit log is used as ChangeLog. See dist-hook in

INSTALL

@@ -246,6 +246,42 @@ XZ Utils Installation
                 the liblzma ABI, so this option should be used only when
                 it is known to not cause problems.
 
+    --enable-external-sha256
+                Try to use SHA-256 code from the operating system libc
+                or similar base system libraries. This doesn't try to
+                use OpenSSL or libgcrypt or such libraries.
+
+                The reasons to use this option:
+
+                  - It makes liblzma slightly smaller.
+
+                  - It might improve SHA-256 speed if the implementation
+                    in the operating is very good (but see below).
+
+                External SHA-256 is disabled by default for two reasons:
+
+                  - On some operating systems the symbol names of the
+                    SHA-256 functions conflict with OpenSSL's libcrypto.
+                    This causes weird problems such as decompression
+                    errors if an application is linked against both
+                    liblzma and libcrypto. This problem affects at least
+                    FreeBSD 10 and older and MINIX 3.3.0 and older, but
+                    other OSes that provide a function "SHA256_Init" might
+                    also be affected. FreeBSD 11 has the problem fixed.
+                    NetBSD had the problem but it was fixed it in 2009
+                    already. OpenBSD uses "SHA256Init" and thus never had
+                    a conflict with libcrypto.
+
+                  - The SHA-256 code in liblzma is faster than the SHA-256
+                    code provided by some operating systems. If you are
+                    curious, build two copies of xz (internal and external
+                    SHA-256) and compare the decompression (xz --test)
+                    times:
+
+                        dd if=/dev/zero bs=1024k count=1024 \
+                            | xz -v -0 -Csha256 > foo.xz
+                        time xz --test foo.xz
+
     --disable-xz
     --disable-xzdec
     --disable-lzmadec
@@ -363,6 +399,34 @@ XZ Utils Installation
                                 calls any liblzma functions from more than
                                 one thread, something bad may happen.
 
+    --enable-sandbox=METHOD
+                This feature is EXPERIMENTAL in the XZ Utils 5.2.x and
+                disabled by default. If you test this, look especially
+                if message translations and locale-specific decimal and
+                thousand separators (e.g. xz --list foo.xz) work the
+                same way as they do without sandboxing.
+
+                There is limited sandboxing support in the xz tool. If
+                built with sandbox support, it's used automatically when
+                (de)compressing exactly one file to standard output and
+                the options --files or --files0 weren't used. This is a
+                common use case, for example, (de)compressing .tar.xz
+                files via GNU tar. The sandbox is also used for
+                single-file `xz --test' or `xz --list'.
+
+                Supported METHODs:
+
+                        auto    Look for a supported sandboxing method
+                                and use it if found. If no method is
+                                found, then sandboxing isn't used.
+
+                        no      Disable sandboxing support.
+
+                        capsicum
+                                Use Capsicum (FreeBSD >= 10) for
+                                sandboxing. If no Capsicum support
+                                is found, configure will give an error.
+
     --enable-symbol-versions
                 Use symbol versioning for liblzma. This is enabled by
                 default on GNU/Linux, other GNU-based systems, and

Makefile.am

@@ -77,7 +77,8 @@ manfiles = \
 # Convert the man pages to PDF and plain text (ASCII only) formats.
 dist-hook:
 	if test -d "$(srcdir)/.git" && type git > /dev/null 2>&1; then \
-		( cd "$(srcdir)" && git log --date=iso --stat ) \
+		( cd "$(srcdir)" && git log --date=iso --stat \
+			b667a3ef6338a2c1db7b7706b1f6c99ea392221c^..HEAD ) \
 			> "$(distdir)/ChangeLog"; \
 	fi
 	if type groff > /dev/null 2>&1 && type ps2pdf > /dev/null 2>&1; then \

NEWS

@@ -2,6 +2,72 @@
 XZ Utils Release Notes
 ======================
 
+5.2.4 (2018-04-29)
+
+    * liblzma:
+
+        - Allow 0 as memory usage limit instead of returning
+          LZMA_PROG_ERROR. Now 0 is treated as if 1 byte was specified,
+          which effectively is the same as 0.
+
+        - Use "noexcept" keyword instead of "throw()" in the public
+          headers when a C++11 (or newer standard) compiler is used.
+
+        - Added a portability fix for recent Intel C Compilers.
+
+        - Microsoft Visual Studio build files have been moved under
+          windows/vs2013 and windows/vs2017.
+
+    * xz:
+
+        - Fix "xz --list --robot missing_or_bad_file.xz" which would
+          try to print an unitialized string and thus produce garbage
+          output. Since the exit status is non-zero, most uses of such
+          a command won't try to interpret the garbage output.
+
+        - "xz --list foo.xz" could print "Internal error (bug)" in a
+          corner case where a specific memory usage limit had been set.
+
+
+5.2.3 (2016-12-30)
+
+    * xz:
+
+        - Always close a file before trying to delete it to avoid
+          problems on some operating system and file system combinations.
+
+        - Fixed copying of file timestamps on Windows.
+
+        - Added experimental (disabled by default) sandbox support using
+          Capsicum (FreeBSD >= 10). See --enable-sandbox in INSTALL.
+
+    * C99/C11 conformance fixes to liblzma. The issues affected at least
+      some builds using link-time optimizations.
+
+    * Fixed bugs in the rarely-used function lzma_index_dup().
+
+    * Use of external SHA-256 code is now disabled by default.
+      It can still be enabled by passing --enable-external-sha256
+      to configure. The reasons to disable it by default (see INSTALL
+      for more details):
+
+        - Some OS-specific SHA-256 implementations conflict with
+          OpenSSL and cause problems in programs that link against both
+          liblzma and libcrypto. At least FreeBSD 10 and MINIX 3.3.0
+          are affected.
+
+        - The internal SHA-256 is faster than the SHA-256 code in
+          some operating systems.
+
+    * Changed CPU core count detection to use sched_getaffinity() on
+      GNU/Linux and GNU/kFreeBSD.
+
+    * Fixes to the build-system and xz to make xz buildable even when
+      encoders, decoders, or threading have been disabled from libilzma
+      using configure options. These fixes added two new #defines to
+      config.h: HAVE_ENCODERS and HAVE_DECODERS.
+
+
 5.2.2 (2015-09-29)
 
     * Fixed bugs in QNX-specific code.

README

@@ -291,7 +291,7 @@ XZ Utils
     XZ Embedded is a limited implementation written for use in the Linux
     kernel, but it is also suitable for other embedded use.
 
-        http://tukaani.org/xz/embedded.html
+        https://tukaani.org/xz/embedded.html
 
 
 6. Contact information

THANKS

@@ -11,7 +11,9 @@ has been important. :-) In alphabetical order:
   - Karl Berry
   - Anders F. Björklund
   - Emmanuel Blot
+  - Melanie Blower
   - Martin Blumenstingl
+  - Ben Boeckel
   - Jakub Bogusz
   - Maarten Bosmans
   - Trent W. Buck
@@ -56,6 +58,7 @@ has been important. :-) In alphabetical order:
   - Andraž 'ruskie' Levstik
   - Cary Lewis
   - Wim Lewis
+  - Eric Lindblad
   - Lorenzo De Liso
   - Bela Lubkin
   - Gregory Margo
@@ -64,6 +67,7 @@ has been important. :-) In alphabetical order:
   - Conley Moorhous
   - Rafał Mużyło
   - Adrien Nader
+  - Evan Nemerson
   - Hongbo Ni
   - Jonathan Nieder
   - Andre Noll
@@ -74,6 +78,7 @@ has been important. :-) In alphabetical order:
   - Diego Elio Pettenò
   - Elbert Pol
   - Mikko Pouru
+  - Rich Prohaska
   - Trần Ngọc Quân
   - Pavel Raiskup
   - Ole André Vadla Ravnås
@@ -89,7 +94,9 @@ has been important. :-) In alphabetical order:
   - Andreas Schwab
   - Dan Shechter
   - Stuart Shelton
+  - Sebastian Andrzej Siewior
   - Brad Smith
+  - Pippijn van Steenhoven
   - Jonathan Stott
   - Dan Stromberg
   - Vincent Torri
@@ -102,6 +109,7 @@ has been important. :-) In alphabetical order:
   - Christian Weisgerber
   - Bert Wesarg
   - Fredrik Wikstrom
+  - Jim Wilcoxson
   - Ralf Wildenhues
   - Charles Wilson
   - Lars Wirzenius

configure.ac

@@ -18,7 +18,7 @@
 AC_PREREQ([2.64])
 
 AC_INIT([XZ Utils], m4_esyscmd([/bin/sh build-aux/version.sh]),
-	[lasse.collin@tukaani.org], [xz], [http://tukaani.org/xz/])
+	[lasse.collin@tukaani.org], [xz], [https://tukaani.org/xz/])
 AC_CONFIG_SRCDIR([src/liblzma/common/common.h])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
@@ -97,6 +97,7 @@ AC_ARG_ENABLE([encoders], AS_HELP_STRING([--enable-encoders=LIST],
 	[], [enable_encoders=SUPPORTED_FILTERS])
 enable_encoders=`echo "$enable_encoders" | sed 's/,/ /g'`
 if test "x$enable_encoders" = xno || test "x$enable_encoders" = x; then
+	enable_encoders=no
 	AC_MSG_RESULT([(none)])
 else
 	for arg in $enable_encoders
@@ -114,6 +115,8 @@ else
 				;;
 		esac
 	done
+	AC_DEFINE([HAVE_ENCODERS], [1],
+		[Define to 1 if any of HAVE_ENCODER_foo have been defined.])
 	AC_MSG_RESULT([$enable_encoders])
 fi
 
@@ -124,6 +127,7 @@ AC_ARG_ENABLE([decoders], AS_HELP_STRING([--enable-decoders=LIST],
 	[], [enable_decoders=SUPPORTED_FILTERS])
 enable_decoders=`echo "$enable_decoders" | sed 's/,/ /g'`
 if test "x$enable_decoders" = xno || test "x$enable_decoders" = x; then
+	enable_decoders=no
 	AC_MSG_RESULT([(none)])
 else
 	for arg in $enable_decoders
@@ -141,11 +145,8 @@ else
 				;;
 		esac
 	done
-
-	# LZMA2 requires that LZMA1 is enabled.
-	test "x$enable_encoder_lzma2" = xyes && enable_encoder_lzma1=yes
-	test "x$enable_decoder_lzma2" = xyes && enable_decoder_lzma1=yes
-
+	AC_DEFINE([HAVE_DECODERS], [1],
+		[Define to 1 if any of HAVE_DECODER_foo have been defined.])
 	AC_MSG_RESULT([$enable_decoders])
 fi
 
@@ -154,8 +155,8 @@ if test "x$enable_encoder_lzma2$enable_encoder_lzma1" = xyesno \
 	AC_MSG_ERROR([LZMA2 requires that LZMA1 is also enabled.])
 fi
 
-AM_CONDITIONAL(COND_MAIN_ENCODER, test "x$enable_encoders" != xno && test "x$enable_encoders" != x)
-AM_CONDITIONAL(COND_MAIN_DECODER, test "x$enable_decoders" != xno && test "x$enable_decoders" != x)
+AM_CONDITIONAL(COND_MAIN_ENCODER, test "x$enable_encoders" != xno)
+AM_CONDITIONAL(COND_MAIN_DECODER, test "x$enable_decoders" != xno)
 
 m4_foreach([NAME], [SUPPORTED_FILTERS],
 [AM_CONDITIONAL(COND_FILTER_[]m4_toupper(NAME), test "x$enable_filter_[]NAME" = xyes)
@@ -274,6 +275,20 @@ m4_foreach([NAME], [SUPPORTED_CHECKS],
 [AM_CONDITIONAL(COND_CHECK_[]m4_toupper(NAME), test "x$enable_check_[]NAME" = xyes)
 ])dnl
 
+AC_MSG_CHECKING([if external SHA-256 should be used])
+AC_ARG_ENABLE([external-sha256], AS_HELP_STRING([--enable-external-sha256],
+		[Use SHA-256 code from the operating system.
+		See INSTALL for possible subtle problems.]),
+		[], [enable_external_sha256=no])
+if test "x$enable_check_sha256" != "xyes"; then
+	enable_external_sha256=no
+fi
+if test "x$enable_external_sha256" = xyes; then
+	AC_MSG_RESULT([yes])
+else
+	AC_MSG_RESULT([no])
+fi
+
 
 ###########################
 # Assembler optimizations #
@@ -415,18 +430,21 @@ AM_CONDITIONAL([COND_XZ], [test x$enable_xz != xno])
 AC_ARG_ENABLE([xzdec], [AS_HELP_STRING([--disable-xzdec],
 		[do not build xzdec])],
 	[], [enable_xzdec=yes])
+test "x$enable_decoders" = xno && enable_xzdec=no
 AM_CONDITIONAL([COND_XZDEC], [test x$enable_xzdec != xno])
 
 AC_ARG_ENABLE([lzmadec], [AS_HELP_STRING([--disable-lzmadec],
 		[do not build lzmadec
 		(it exists primarily for LZMA Utils compatibility)])],
 	[], [enable_lzmadec=yes])
+test "x$enable_decoder_lzma1" = xno && enable_lzmadec=no
 AM_CONDITIONAL([COND_LZMADEC], [test x$enable_lzmadec != xno])
 
 AC_ARG_ENABLE([lzmainfo], [AS_HELP_STRING([--disable-lzmainfo],
 		[do not build lzmainfo
 		(it exists primarily for LZMA Utils compatibility)])],
 	[], [enable_lzmainfo=yes])
+test "x$enable_decoder_lzma1" = xno && enable_lzmainfo=no
 AM_CONDITIONAL([COND_LZMAINFO], [test x$enable_lzmainfo != xno])
 
 AC_ARG_ENABLE([lzma-links], [AS_HELP_STRING([--disable-lzma-links],
@@ -474,6 +492,30 @@ AC_MSG_RESULT([$enable_symbol_versions])
 AM_CONDITIONAL([COND_SYMVERS], [test "x$enable_symbol_versions" = xyes])
 
 
+##############
+# Sandboxing #
+##############
+
+AC_MSG_CHECKING([if sandboxing should be used])
+AC_ARG_ENABLE([sandbox], [AS_HELP_STRING([--enable-sandbox=METHOD],
+		[This is an experimental feature.
+		Sandboxing METHOD can be `auto', `no', or `capsicum'.
+		The default is `no'.])],
+	[], [enable_sandbox=no])
+case $enable_sandbox in
+	auto)
+		AC_MSG_RESULT([maybe (autodetect)])
+		;;
+	no | capsicum)
+		AC_MSG_RESULT([$enable_sandbox])
+		;;
+	*)
+		AC_MSG_RESULT([])
+		AC_MSG_ERROR([--enable-sandbox only accepts `auto', `no', or `capsicum'.])
+		;;
+esac
+
+
 ###############################################################################
 # Checks for programs.
 ###############################################################################
@@ -567,7 +609,7 @@ AM_CONDITIONAL([COND_SHARED], [test "x$enable_shared" != xno])
 
 echo
 echo "Initializing gettext:"
-AM_GNU_GETTEXT_VERSION([0.18])
+AM_GNU_GETTEXT_VERSION([0.19])
 AM_GNU_GETTEXT([external])
 
 
@@ -630,7 +672,7 @@ AC_C_BIGENDIAN
 gl_GETOPT
 
 # Find the best function to set timestamps.
-AC_CHECK_FUNCS([futimens futimes futimesat utimes utime], [break])
+AC_CHECK_FUNCS([futimens futimes futimesat utimes _futime utime], [break])
 
 # This is nice to have but not mandatory.
 AC_CHECK_FUNCS([posix_fadvise])
@@ -641,34 +683,34 @@ TUKLIB_PHYSMEM
 TUKLIB_CPUCORES
 TUKLIB_MBSTR
 
-# Check for system-provided SHA-256. At least the following is supported:
+# If requsted, check for system-provided SHA-256. At least the following
+# implementations are supported:
 #
 # OS       Headers                     Library  Type           Function
 # FreeBSD  sys/types.h + sha256.h      libmd    SHA256_CTX     SHA256_Init
 # NetBSD   sys/types.h + sha2.h                 SHA256_CTX     SHA256_Init
 # OpenBSD  sys/types.h + sha2.h                 SHA2_CTX       SHA256Init
 # Solaris  sys/types.h + sha2.h        libmd    SHA256_CTX     SHA256Init
-# MINIX 3  sys/types.h + minix/sha2.h  libutil  SHA256_CTX     SHA256_Init
+# MINIX 3  sys/types.h + sha2.h                 SHA256_CTX     SHA256_Init
 # Darwin   CommonCrypto/CommonDigest.h          CC_SHA256_CTX  CC_SHA256_Init
 #
 # Note that Darwin's CC_SHA256_Update takes buffer size as uint32_t instead
 # of size_t.
 #
-# We don't check for e.g. OpenSSL or libgcrypt because we don't want
-# to introduce dependencies to other packages by default. Maybe such
-# libraries could be supported via additional configure options though.
-#
-if test "x$enable_check_sha256" = "xyes"; then
+sha256_header_found=no
+sha256_type_found=no
+sha256_func_found=no
+if test "x$enable_external_sha256" = "xyes"; then
 	# Test for Common Crypto before others, because Darwin has sha256.h
 	# too and we don't want to use that, because on older versions it
 	# uses OpenSSL functions, whose SHA256_Init is not guaranteed to
 	# succeed.
-	sha256_header_found=no
 	AC_CHECK_HEADERS(
-		[CommonCrypto/CommonDigest.h sha256.h sha2.h minix/sha2.h],
+		[CommonCrypto/CommonDigest.h sha256.h sha2.h],
 		[sha256_header_found=yes ; break])
 	if test "x$sha256_header_found" = xyes; then
-		AC_CHECK_TYPES([CC_SHA256_CTX, SHA256_CTX, SHA2_CTX], [], [],
+		AC_CHECK_TYPES([CC_SHA256_CTX, SHA256_CTX, SHA2_CTX],
+			[sha256_type_found=yes], [],
 			[[#ifdef HAVE_SYS_TYPES_H
 			  # include <sys/types.h>
 			  #endif
@@ -680,20 +722,19 @@ if test "x$enable_check_sha256" = "xyes"; then
 			  #endif
 			  #ifdef HAVE_SHA2_H
 			  # include <sha2.h>
-			  #endif
-			  #ifdef HAVE_MINIX_SHA2_H
-			  # include <minix/sha2.h>
 			  #endif]])
-		AC_SEARCH_LIBS([SHA256_Init], [md util])
-		AC_SEARCH_LIBS([SHA256Init], [md])
-		AC_CHECK_FUNCS([CC_SHA256_Init SHA256_Init SHA256Init],
-			[break])
+		if test "x$sha256_type_found" = xyes ; then
+			AC_SEARCH_LIBS([SHA256Init], [md])
+			AC_SEARCH_LIBS([SHA256_Init], [md])
+			AC_CHECK_FUNCS([CC_SHA256_Init SHA256Init SHA256_Init],
+				[sha256_func_found=yes ; break])
+		fi
 	fi
 fi
-AM_CONDITIONAL([COND_INTERNAL_SHA256],
-	[test "x$ac_cv_func_SHA256_Init" != xyes \
-		&& test "x$ac_cv_func_SHA256Init" != xyes \
-		&& test "x$ac_cv_func_CC_SHA256_Init" != xyes])
+AM_CONDITIONAL([COND_INTERNAL_SHA256], [test "x$sha256_func_found" = xno])
+if test "x$enable_external_sha256$sha256_func_found" = xyesno; then
+	AC_MSG_ERROR([--enable-external-sha256 was specified but no supported external SHA-256 implementation was found])
+fi
 
 # Check for SSE2 intrinsics.
 AC_CHECK_DECL([_mm_movemask_epi8],
@@ -704,6 +745,23 @@ AC_CHECK_DECL([_mm_movemask_epi8],
 #include <immintrin.h>
 #endif])
 
+# Check for sandbox support. If one is found, set enable_sandbox=found.
+case $enable_sandbox in
+	auto | capsicum)
+		AX_CHECK_CAPSICUM([enable_sandbox=found], [:])
+		;;
+esac
+
+# If a specific sandboxing method was explicitly requested and it wasn't
+# found, give an error.
+case $enable_sandbox in
+	auto | no | found)
+		;;
+	*)
+		AC_MSG_ERROR([$enable_sandbox support not found])
+		;;
+esac
+
 
 ###############################################################################
 # If using GCC, set some additional AM_CFLAGS:

doc/examples/02_decompress.c

@@ -138,7 +138,7 @@ decompress(lzma_stream *strm, const char *inname, FILE *infile, FILE *outfile)
 			// Once the end of the input file has been reached,
 			// we need to tell lzma_code() that no more input
 			// will be coming. As said before, this isn't required
-			// if the LZMA_CONATENATED flag isn't used when
+			// if the LZMA_CONCATENATED flag isn't used when
 			// initializing the decoder.
 			if (feof(infile))
 				action = LZMA_FINISH;

doc/faq.txt

@@ -206,7 +206,7 @@ Q:  How do I build a program that needs liblzmadec (lzmadec.h)?
 A:  liblzmadec is part of LZMA Utils. XZ Utils has liblzma, but no
     liblzmadec. The code using liblzmadec should be ported to use
     liblzma instead. If you cannot or don't want to do that, download
-    LZMA Utils from <http://tukaani.org/lzma/>.
+    LZMA Utils from <https://tukaani.org/lzma/>.
 
 
 Q:  The default build of liblzma is too big. How can I make it smaller?
@@ -220,5 +220,5 @@ A:  Give --enable-small to the configure script. Use also appropriate
     If the result is still too big, take a look at XZ Embedded. It is
     a separate project, which provides a limited but significantly
     smaller XZ decoder implementation than XZ Utils. You can find it
-    at <http://tukaani.org/xz/embedded.html>.
+    at <https://tukaani.org/xz/embedded.html>.
 

dos/config.h

@@ -10,6 +10,9 @@
 /* Define to 1 if sha256 integrity check is enabled. */
 #define HAVE_CHECK_SHA256 1
 
+/* Define to 1 if any of HAVE_DECODER_foo have been defined. */
+#define HAVE_DECODERS 1
+
 /* Define to 1 if arm decoder is enabled. */
 #define HAVE_DECODER_ARM 1
 
@@ -37,6 +40,9 @@
 /* Define to 1 if x86 decoder is enabled. */
 #define HAVE_DECODER_X86 1
 
+/* Define to 1 if any of HAVE_ENCODER_foo have been defined. */
+#define HAVE_ENCODERS 1
+
 /* Define to 1 if arm encoder is enabled. */
 #define HAVE_ENCODER_ARM 1
 
@@ -120,7 +126,7 @@
 #define PACKAGE_NAME "XZ Utils"
 
 /* Define to the home page for this package. */
-#define PACKAGE_URL "http://tukaani.org/xz/"
+#define PACKAGE_URL "https://tukaani.org/xz/"
 
 /* The size of `size_t', as computed by sizeof. */
 #define SIZEOF_SIZE_T 4

extra/scanlzma/scanlzma.c

@@ -37,6 +37,10 @@
 /*   5     8   Uncompressed size (little endian). -1 means unknown size */
 /*  13         Compressed data */
 
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
 #define BUFSIZE 4096
 
 int find_lzma_header(unsigned char *buf) {
@@ -48,7 +52,7 @@ int find_lzma_header(unsigned char *buf) {
 }
 
 int main(int argc, char *argv[]) {
-	char buf[BUFSIZE];
+	unsigned char buf[BUFSIZE];
 	int ret, i, numlzma, blocks=0;
 
 	if (argc != 2) {

m4/ax_check_capsicum.m4

@@ -0,0 +1,85 @@
+# -*- Autoconf -*-
+
+# SYNOPSIS
+#
+#   AX_CHECK_CAPSICUM([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro searches for an installed Capsicum header and library,
+#   and if found:
+#     - AC_DEFINE([HAVE_CAPSICUM]) is called.
+#     - AC_DEFINE([HAVE_SYS_CAPSICUM_H]) is called if <sys/capsicum.h>
+#       is present (otherwise <sys/capability.h> must be used).
+#     - CAPSICUM_LIB is set to the -l option needed to link Capsicum support,
+#       and AC_SUBST([CAPSICUM_LIB]) is called.
+#     - The shell commands in ACTION-IF-FOUND are run. The default
+#       ACTION-IF-FOUND prepends ${CAPSICUM_LIB} into LIBS. If you don't
+#       want to modify LIBS and don't need to run any other commands either,
+#       use a colon as ACTION-IF-FOUND.
+#
+#   If Capsicum support isn't found:
+#     - The shell commands in ACTION-IF-NOT-FOUND are run. The default
+#       ACTION-IF-NOT-FOUND calls AC_MSG_WARN to print a warning that
+#       Capsicum support wasn't found.
+#
+#   You should use autoheader to include a definition for the symbols above
+#   in a config.h file.
+#
+#   Sample usage in a C/C++ source is as follows:
+#
+#     #ifdef HAVE_CAPSICUM
+#     # ifdef HAVE_SYS_CAPSICUM_H
+#     #  include <sys/capsicum.h>
+#     # else
+#     #  include <sys/capability.h>
+#     # endif
+#     #endif /* HAVE_CAPSICUM */
+#
+# LICENSE
+#
+#   Copyright (c) 2014 Google Inc.
+#   Copyright (c) 2015 Lasse Collin <lasse.collin@tukaani.org>
+#
+#   Copying and distribution of this file, with or without modification,
+#   are permitted in any medium without royalty provided the copyright
+#   notice and this notice are preserved.  This file is offered as-is,
+#   without any warranty.
+
+#serial 2
+
+AC_DEFUN([AX_CHECK_CAPSICUM], [
+# On FreeBSD >= 11.x and Linux, Capsicum is uses <sys/capsicum.h>.
+# If this header is found, it is assumed to be the right one.
+capsicum_header_found=no
+AC_CHECK_HEADERS([sys/capsicum.h], [capsicum_header_found=yes])
+if test "$capsicum_header_found" = no ; then
+    # On FreeBSD 10.x Capsicum uses <sys/capability.h>. Such a header exists
+    # on Linux too but it describes POSIX.1e capabilities. Look for the
+    # declaration of cap_rights_limit to check if <sys/capability.h> is
+    # a Capsicum header.
+    AC_CHECK_DECL([cap_rights_limit], [capsicum_header_found=yes], [],
+                  [#include <sys/capability.h>])
+fi
+
+capsicum_lib_found=no
+CAPSICUM_LIB=
+if test "$capsicum_header_found" = yes ; then
+    AC_LANG_PUSH([C])
+    # FreeBSD >= 10.x has Capsicum functions in libc.
+    AC_LINK_IFELSE([AC_LANG_CALL([], [cap_rights_limit])],
+                   [capsicum_lib_found=yes], [])
+    # Linux has Capsicum functions in libcaprights.
+    AC_CHECK_LIB([caprights], [cap_rights_limit],
+                 [CAPSICUM_LIB=-lcaprights
+                  capsicum_lib_found=yes], [])
+    AC_LANG_POP([C])
+fi
+AC_SUBST([CAPSICUM_LIB])
+
+if test "$capsicum_lib_found" = yes ; then
+    AC_DEFINE([HAVE_CAPSICUM], [1], [Define to 1 if Capsicum is available.])
+    m4_default([$1], [LIBS="${CAPSICUM_LIB} $LIBS"])
+else
+    m4_default([$2], [AC_MSG_WARN([Capsicum support not found])])
+fi])

m4/tuklib_cpucores.m4

@@ -10,6 +10,8 @@
 #
 #   Supported methods:
 #     - GetSystemInfo(): Windows (including Cygwin)
+#     - sched_getaffinity(): glibc (GNU/Linux, GNU/kFreeBSD)
+#     - cpuset_getaffinity(): FreeBSD
 #     - sysctl(): BSDs, OS/2
 #     - sysconf(): GNU/Linux, Solaris, Tru64, IRIX, AIX, QNX, Cygwin (but
 #       GetSystemInfo() is used on Cygwin)
@@ -45,8 +47,29 @@ compile error
 #endif
 ]])], [tuklib_cv_cpucores_method=special], [
 
+# glibc-based systems (GNU/Linux and GNU/kFreeBSD) have sched_getaffinity().
+# The CPU_COUNT() macro was added in glibc 2.9 so we try to link the
+# test program instead of merely compiling it. glibc 2.9 is old enough that
+# if someone uses the code on older glibc, the fallback to sysconf() should
+# be good enough.
+AC_LINK_IFELSE([AC_LANG_SOURCE([[
+#include <sched.h>
+int
+main(void)
+{
+	cpu_set_t cpu_mask;
+	sched_getaffinity(0, sizeof(cpu_mask), &cpu_mask);
+	return CPU_COUNT(&cpu_mask);
+}
+]])], [tuklib_cv_cpucores_method=sched_getaffinity], [
+
 # FreeBSD has both cpuset and sysctl. Look for cpuset first because
 # it's a better approach.
+#
+# This test would match on GNU/kFreeBSD too but it would require
+# -lfreebsd-glue when linking and thus in the current form this would
+# fail on GNU/kFreeBSD. The above test for sched_getaffinity() matches
+# on GNU/kFreeBSD so the test below should never run on that OS.
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #include <sys/param.h>
 #include <sys/cpuset.h>
@@ -120,9 +143,14 @@ main(void)
 ]])], [tuklib_cv_cpucores_method=pstat_getdynamic], [
 
 	tuklib_cv_cpucores_method=unknown
-])])])])])])
+])])])])])])])
 
 case $tuklib_cv_cpucores_method in
+	sched_getaffinity)
+		AC_DEFINE([TUKLIB_CPUCORES_SCHED_GETAFFINITY], [1],
+			[Define to 1 if the number of available CPU cores
+			can be detected with sched_getaffinity()])
+		;;
 	cpuset)
 		AC_DEFINE([TUKLIB_CPUCORES_CPUSET], [1],
 			[Define to 1 if the number of available CPU cores

src/common/common_w32res.rc

@@ -17,7 +17,7 @@
 #define MY_VERSION LZMA_VERSION_MAJOR,LZMA_VERSION_MINOR,LZMA_VERSION_PATCH,MY_BUILD
 
 #define MY_FILENAME    MY_NAME MY_SUFFIX
-#define MY_COMPANY     "The Tukaani Project <http://tukaani.org/>"
+#define MY_COMPANY     "The Tukaani Project <https://tukaani.org/>"
 #define MY_PRODUCT     PACKAGE_NAME " <" PACKAGE_URL ">"
 
 LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US

src/common/tuklib_cpucores.c

@@ -18,6 +18,10 @@
 #	endif
 #	include <windows.h>
 
+// glibc >= 2.9
+#elif defined(TUKLIB_CPUCORES_SCHED_GETAFFINITY)
+#	include <sched.h>
+
 // FreeBSD
 #elif defined(TUKLIB_CPUCORES_CPUSET)
 #	include <sys/param.h>
@@ -49,6 +53,11 @@ tuklib_cpucores(void)
 	GetSystemInfo(&sysinfo);
 	ret = sysinfo.dwNumberOfProcessors;
 
+#elif defined(TUKLIB_CPUCORES_SCHED_GETAFFINITY)
+	cpu_set_t cpu_mask;
+	if (sched_getaffinity(0, sizeof(cpu_mask), &cpu_mask) == 0)
+		ret = CPU_COUNT(&cpu_mask);
+
 #elif defined(TUKLIB_CPUCORES_CPUSET)
 	cpuset_t set;
 	if (cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,

src/common/tuklib_integer.h

@@ -98,6 +98,17 @@
 #endif
 
 
+////////////////////////////////
+// Compiler-specific features //
+////////////////////////////////
+
+// Newer Intel C compilers require immintrin.h for _bit_scan_reverse()
+// and such functions.
+#if defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 1500)
+#	include <immintrin.h>
+#endif
+
+
 ///////////////////
 // Byte swapping //
 ///////////////////

src/common/tuklib_physmem.c

@@ -86,7 +86,8 @@ tuklib_physmem(void)
 		// GlobalMemoryStatusEx() conditionally.
 		HMODULE kernel32 = GetModuleHandle("kernel32.dll");
 		if (kernel32 != NULL) {
-			BOOL (WINAPI *gmse)(LPMEMORYSTATUSEX) = GetProcAddress(
+			typedef BOOL (WINAPI *gmse_type)(LPMEMORYSTATUSEX);
+			gmse_type gmse = (gmse_type)GetProcAddress(
 					kernel32, "GlobalMemoryStatusEx");
 			if (gmse != NULL) {
 				MEMORYSTATUSEX meminfo;

src/liblzma/Makefile.am

@@ -24,7 +24,7 @@ liblzma_la_CPPFLAGS = \
 	-I$(top_srcdir)/src/liblzma/simple \
 	-I$(top_srcdir)/src/common \
 	-DTUKLIB_SYMBOL_PREFIX=lzma_
-liblzma_la_LDFLAGS = -no-undefined -version-info 7:2:2
+liblzma_la_LDFLAGS = -no-undefined -version-info 7:4:2
 
 EXTRA_DIST += liblzma.map validate_map.sh
 if COND_SYMVERS

src/liblzma/api/lzma.h

@@ -219,7 +219,11 @@
  */
 #ifndef lzma_nothrow
 #	if defined(__cplusplus)
-#		define lzma_nothrow throw()
+#		if __cplusplus >= 201103L
+#			define lzma_nothrow noexcept
+#		else
+#			define lzma_nothrow throw()
+#		endif
 #	elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
 #		define lzma_nothrow __attribute__((__nothrow__))
 #	else

src/liblzma/api/lzma/base.h

@@ -644,11 +644,16 @@ extern LZMA_API(uint64_t) lzma_memlimit_get(const lzma_stream *strm)
  * This function is supported only when *strm has been initialized with
  * a function that takes a memlimit argument.
  *
+ * liblzma 5.2.3 and earlier has a bug where memlimit value of 0 causes
+ * this function to do nothing (leaving the limit unchanged) and still
+ * return LZMA_OK. Later versions treat 0 as if 1 had been specified (so
+ * lzma_memlimit_get() will return 1 even if you specify 0 here).
+ *
  * \return      - LZMA_OK: New memory usage limit successfully set.
  *              - LZMA_MEMLIMIT_ERROR: The new limit is too small.
  *                The limit was not changed.
  *              - LZMA_PROG_ERROR: Invalid arguments, e.g. *strm doesn't
- *                support memory usage limit or memlimit was zero.
+ *                support memory usage limit.
  */
 extern LZMA_API(lzma_ret) lzma_memlimit_set(
 		lzma_stream *strm, uint64_t memlimit) lzma_nothrow;

src/liblzma/api/lzma/container.h

@@ -520,7 +520,10 @@ extern LZMA_API(lzma_ret) lzma_stream_buffer_encode(
  *
  * \param       strm        Pointer to properly prepared lzma_stream
  * \param       memlimit    Memory usage limit as bytes. Use UINT64_MAX
- *                          to effectively disable the limiter.
+ *                          to effectively disable the limiter. liblzma
+ *                          5.2.3 and earlier don't allow 0 here and return
+ *                          LZMA_PROG_ERROR; later versions treat 0 as if 1
+ *                          had been specified.
  * \param       flags       Bitwise-or of zero or more of the decoder flags:
  *                          LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
  *                          LZMA_TELL_ANY_CHECK, LZMA_CONCATENATED
@@ -544,7 +547,10 @@ extern LZMA_API(lzma_ret) lzma_stream_decoder(
  *
  * \param       strm        Pointer to properly prepared lzma_stream
  * \param       memlimit    Memory usage limit as bytes. Use UINT64_MAX
- *                          to effectively disable the limiter.
+ *                          to effectively disable the limiter. liblzma
+ *                          5.2.3 and earlier don't allow 0 here and return
+ *                          LZMA_PROG_ERROR; later versions treat 0 as if 1
+ *                          had been specified.
  * \param       flags       Bitwise-or of flags, or zero for no flags.
  *
  * \return      - LZMA_OK: Initialization was successful.
@@ -560,9 +566,16 @@ extern LZMA_API(lzma_ret) lzma_auto_decoder(
 /**
  * \brief       Initialize .lzma decoder (legacy file format)
  *
+ * \param       strm        Pointer to properly prepared lzma_stream
+ * \param       memlimit    Memory usage limit as bytes. Use UINT64_MAX
+ *                          to effectively disable the limiter. liblzma
+ *                          5.2.3 and earlier don't allow 0 here and return
+ *                          LZMA_PROG_ERROR; later versions treat 0 as if 1
+ *                          had been specified.
+ *
  * Valid `action' arguments to lzma_code() are LZMA_RUN and LZMA_FINISH.
- * There is no need to use LZMA_FINISH, but allowing it may simplify
- * certain types of applications.
+ * There is no need to use LZMA_FINISH, but it's allowed because it may
+ * simplify certain types of applications.
  *
  * \return      - LZMA_OK
  *              - LZMA_MEM_ERROR

src/liblzma/api/lzma/index.h

@@ -586,8 +586,7 @@ extern LZMA_API(lzma_index *) lzma_index_dup(
  * \param       i           Pointer to lzma_index which should be encoded.
  *
  * The valid `action' values for lzma_code() are LZMA_RUN and LZMA_FINISH.
- * It is enough to use only one of them (you can choose freely; use LZMA_RUN
- * to support liblzma versions older than 5.0.0).
+ * It is enough to use only one of them (you can choose freely).
  *
  * \return      - LZMA_OK: Initialization succeeded, continue with lzma_code().
  *              - LZMA_MEM_ERROR
@@ -610,16 +609,21 @@ extern LZMA_API(lzma_ret) lzma_index_encoder(
  *                          to a new lzma_index, which the application
  *                          has to later free with lzma_index_end().
  * \param       memlimit    How much memory the resulting lzma_index is
- *                          allowed to require.
+ *                          allowed to require. liblzma 5.2.3 and earlier
+ *                          don't allow 0 here and return LZMA_PROG_ERROR;
+ *                          later versions treat 0 as if 1 had been specified.
  *
- * The valid `action' values for lzma_code() are LZMA_RUN and LZMA_FINISH.
- * It is enough to use only one of them (you can choose freely; use LZMA_RUN
- * to support liblzma versions older than 5.0.0).
+ * Valid `action' arguments to lzma_code() are LZMA_RUN and LZMA_FINISH.
+ * There is no need to use LZMA_FINISH, but it's allowed because it may
+ * simplify certain types of applications.
  *
  * \return      - LZMA_OK: Initialization succeeded, continue with lzma_code().
  *              - LZMA_MEM_ERROR
- *              - LZMA_MEMLIMIT_ERROR
  *              - LZMA_PROG_ERROR
+ *
+ *              liblzma 5.2.3 and older list also LZMA_MEMLIMIT_ERROR here
+ *              but that error code has never been possible from this
+ *              initialization function.
  */
 extern LZMA_API(lzma_ret) lzma_index_decoder(
 		lzma_stream *strm, lzma_index **i, uint64_t memlimit)

src/liblzma/api/lzma/version.h

@@ -22,7 +22,7 @@
  */
 #define LZMA_VERSION_MAJOR 5
 #define LZMA_VERSION_MINOR 2
-#define LZMA_VERSION_PATCH 2
+#define LZMA_VERSION_PATCH 4
 #define LZMA_VERSION_STABILITY LZMA_VERSION_STABILITY_STABLE
 
 #ifndef LZMA_VERSION_COMMIT

src/liblzma/check/check.h

@@ -15,7 +15,18 @@
 
 #include "common.h"
 
-#if defined(HAVE_COMMONCRYPTO_COMMONDIGEST_H)
+// If the function for external SHA-256 is missing, use the internal SHA-256
+// code. Due to how configure works, these defines can only get defined when
+// both a usable header and a type have already been found.
+#if !(defined(HAVE_CC_SHA256_INIT) \
+		|| defined(HAVE_SHA256_INIT) \
+		|| defined(HAVE_SHA256INIT))
+#	define HAVE_INTERNAL_SHA256 1
+#endif
+
+#if defined(HAVE_INTERNAL_SHA256)
+// Nothing
+#elif defined(HAVE_COMMONCRYPTO_COMMONDIGEST_H)
 #	include <CommonCrypto/CommonDigest.h>
 #elif defined(HAVE_SHA256_H)
 #	include <sys/types.h>
@@ -23,18 +34,9 @@
 #elif defined(HAVE_SHA2_H)
 #	include <sys/types.h>
 #	include <sha2.h>
-#elif defined(HAVE_MINIX_SHA2_H)
-#	include <sys/types.h>
-#	include <minix/sha2.h>
 #endif
 
-#if defined(HAVE_CC_SHA256_CTX)
-typedef CC_SHA256_CTX lzma_sha256_state;
-#elif defined(HAVE_SHA256_CTX)
-typedef SHA256_CTX lzma_sha256_state;
-#elif defined(HAVE_SHA2_CTX)
-typedef SHA2_CTX lzma_sha256_state;
-#else
+#if defined(HAVE_INTERNAL_SHA256)
 /// State for the internal SHA-256 implementation
 typedef struct {
 	/// Internal state
@@ -43,9 +45,17 @@ typedef struct {
 	/// Size of the message excluding padding
 	uint64_t size;
 } lzma_sha256_state;
+#elif defined(HAVE_CC_SHA256_CTX)
+typedef CC_SHA256_CTX lzma_sha256_state;
+#elif defined(HAVE_SHA256_CTX)
+typedef SHA256_CTX lzma_sha256_state;
+#elif defined(HAVE_SHA2_CTX)
+typedef SHA2_CTX lzma_sha256_state;
 #endif
 
-#if defined(HAVE_CC_SHA256_INIT)
+#if defined(HAVE_INTERNAL_SHA256)
+// Nothing
+#elif defined(HAVE_CC_SHA256_INIT)
 #	define LZMA_SHA256FUNC(x) CC_SHA256_ ## x
 #elif defined(HAVE_SHA256_INIT)
 #	define LZMA_SHA256FUNC(x) SHA256_ ## x

src/liblzma/common/Makefile.inc

@@ -21,6 +21,10 @@ liblzma_la_SOURCES += \
 	common/stream_flags_common.h \
 	common/vli_size.c
 
+if COND_THREADS
+liblzma_la_SOURCES += common/hardware_cputhreads.c
+endif
+
 if COND_MAIN_ENCODER
 liblzma_la_SOURCES += \
 	common/alone_encoder.c \
@@ -45,7 +49,6 @@ liblzma_la_SOURCES += \
 
 if COND_THREADS
 liblzma_la_SOURCES += \
-	common/hardware_cputhreads.c \
 	common/outqueue.c \
 	common/outqueue.h \
 	common/stream_encoder_mt.c

src/liblzma/common/alone_decoder.c

@@ -15,7 +15,7 @@
 #include "lz_decoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	lzma_next_coder next;
 
 	enum {
@@ -46,17 +46,19 @@ struct lzma_coder_s {
 	/// Options decoded from the header needed to initialize
 	/// the LZMA decoder
 	lzma_options_lzma options;
-};
+} lzma_alone_coder;
 
 
 static lzma_ret
-alone_decode(lzma_coder *coder,
+alone_decode(void *coder_ptr,
 		const lzma_allocator *allocator lzma_attribute((__unused__)),
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
 		lzma_action action)
 {
+	lzma_alone_coder *coder = coder_ptr;
+
 	while (*out_pos < out_size
 			&& (coder->sequence == SEQ_CODE || *in_pos < in_size))
 	switch (coder->sequence) {
@@ -166,8 +168,9 @@ alone_decode(lzma_coder *coder,
 
 
 static void
-alone_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+alone_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_alone_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -175,9 +178,11 @@ alone_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-alone_decoder_memconfig(lzma_coder *coder, uint64_t *memusage,
+alone_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
 		uint64_t *old_memlimit, uint64_t new_memlimit)
 {
+	lzma_alone_coder *coder = coder_ptr;
+
 	*memusage = coder->memusage;
 	*old_memlimit = coder->memlimit;
 
@@ -198,29 +203,29 @@ lzma_alone_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 {
 	lzma_next_coder_init(&lzma_alone_decoder_init, next, allocator);
 
-	if (memlimit == 0)
-		return LZMA_PROG_ERROR;
+	lzma_alone_coder *coder = next->coder;
 
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_alone_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &alone_decode;
 		next->end = &alone_decoder_end;
 		next->memconfig = &alone_decoder_memconfig;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
-	next->coder->sequence = SEQ_PROPERTIES;
-	next->coder->picky = picky;
-	next->coder->pos = 0;
-	next->coder->options.dict_size = 0;
-	next->coder->options.preset_dict = NULL;
-	next->coder->options.preset_dict_size = 0;
-	next->coder->uncompressed_size = 0;
-	next->coder->memlimit = memlimit;
-	next->coder->memusage = LZMA_MEMUSAGE_BASE;
+	coder->sequence = SEQ_PROPERTIES;
+	coder->picky = picky;
+	coder->pos = 0;
+	coder->options.dict_size = 0;
+	coder->options.preset_dict = NULL;
+	coder->options.preset_dict_size = 0;
+	coder->uncompressed_size = 0;
+	coder->memlimit = my_max(1, memlimit);
+	coder->memusage = LZMA_MEMUSAGE_BASE;
 
 	return LZMA_OK;
 }

src/liblzma/common/alone_encoder.c

@@ -17,7 +17,7 @@
 #define ALONE_HEADER_SIZE (1 + 4 + 8)
 
 
-struct lzma_coder_s {
+typedef struct {
 	lzma_next_coder next;
 
 	enum {
@@ -27,17 +27,19 @@ struct lzma_coder_s {
 
 	size_t header_pos;
 	uint8_t header[ALONE_HEADER_SIZE];
-};
+} lzma_alone_coder;
 
 
 static lzma_ret
-alone_encode(lzma_coder *coder,
+alone_encode(void *coder_ptr,
 		const lzma_allocator *allocator lzma_attribute((__unused__)),
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
 		lzma_action action)
 {
+	lzma_alone_coder *coder = coder_ptr;
+
 	while (*out_pos < out_size)
 	switch (coder->sequence) {
 	case SEQ_HEADER:
@@ -65,8 +67,9 @@ alone_encode(lzma_coder *coder,
 
 
 static void
-alone_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+alone_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_alone_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -80,23 +83,26 @@ alone_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 {
 	lzma_next_coder_init(&alone_encoder_init, next, allocator);
 
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_alone_coder *coder = next->coder;
+
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_alone_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &alone_encode;
 		next->end = &alone_encoder_end;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
 	// Basic initializations
-	next->coder->sequence = SEQ_HEADER;
-	next->coder->header_pos = 0;
+	coder->sequence = SEQ_HEADER;
+	coder->header_pos = 0;
 
 	// Encode the header:
 	// - Properties (1 byte)
-	if (lzma_lzma_lclppb_encode(options, next->coder->header))
+	if (lzma_lzma_lclppb_encode(options, coder->header))
 		return LZMA_OPTIONS_ERROR;
 
 	// - Dictionary size (4 bytes)
@@ -116,10 +122,10 @@ alone_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 	if (d != UINT32_MAX)
 		++d;
 
-	unaligned_write32le(next->coder->header + 1, d);
+	unaligned_write32le(coder->header + 1, d);
 
 	// - Uncompressed size (always unknown and using EOPM)
-	memset(next->coder->header + 1 + 4, 0xFF, 8);
+	memset(coder->header + 1 + 4, 0xFF, 8);
 
 	// Initialize the LZMA encoder.
 	const lzma_filter_info filters[2] = {
@@ -131,7 +137,7 @@ alone_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		}
 	};
 
-	return lzma_next_filter_init(&next->coder->next, allocator, filters);
+	return lzma_next_filter_init(&coder->next, allocator, filters);
 }
 
 

src/liblzma/common/auto_decoder.c

@@ -14,7 +14,7 @@
 #include "alone_decoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	/// Stream decoder or LZMA_Alone decoder
 	lzma_next_coder next;
 
@@ -26,15 +26,17 @@ struct lzma_coder_s {
 		SEQ_CODE,
 		SEQ_FINISH,
 	} sequence;
-};
+} lzma_auto_coder;
 
 
 static lzma_ret
-auto_decode(lzma_coder *coder, const lzma_allocator *allocator,
+auto_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_auto_coder *coder = coder_ptr;
+
 	switch (coder->sequence) {
 	case SEQ_INIT:
 		if (*in_pos >= in_size)
@@ -100,8 +102,9 @@ auto_decode(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-auto_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+auto_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_auto_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -109,8 +112,10 @@ auto_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_check
-auto_decoder_get_check(const lzma_coder *coder)
+auto_decoder_get_check(const void *coder_ptr)
 {
+	const lzma_auto_coder *coder = coder_ptr;
+
 	// It is LZMA_Alone if get_check is NULL.
 	return coder->next.get_check == NULL ? LZMA_CHECK_NONE
 			: coder->next.get_check(coder->next.coder);
@@ -118,9 +123,11 @@ auto_decoder_get_check(const lzma_coder *coder)
 
 
 static lzma_ret
-auto_decoder_memconfig(lzma_coder *coder, uint64_t *memusage,
+auto_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
 		uint64_t *old_memlimit, uint64_t new_memlimit)
 {
+	lzma_auto_coder *coder = coder_ptr;
+
 	lzma_ret ret;
 
 	if (coder->next.memconfig != NULL) {
@@ -132,7 +139,10 @@ auto_decoder_memconfig(lzma_coder *coder, uint64_t *memusage,
 		// the current memory usage.
 		*memusage = LZMA_MEMUSAGE_BASE;
 		*old_memlimit = coder->memlimit;
+
 		ret = LZMA_OK;
+		if (new_memlimit != 0 && new_memlimit < *memusage)
+			ret = LZMA_MEMLIMIT_ERROR;
 	}
 
 	if (ret == LZMA_OK && new_memlimit != 0)
@@ -148,27 +158,26 @@ auto_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 {
 	lzma_next_coder_init(&auto_decoder_init, next, allocator);
 
-	if (memlimit == 0)
-		return LZMA_PROG_ERROR;
-
 	if (flags & ~LZMA_SUPPORTED_FLAGS)
 		return LZMA_OPTIONS_ERROR;
 
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_auto_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_auto_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &auto_decode;
 		next->end = &auto_decoder_end;
 		next->get_check = &auto_decoder_get_check;
 		next->memconfig = &auto_decoder_memconfig;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
-	next->coder->memlimit = memlimit;
-	next->coder->flags = flags;
-	next->coder->sequence = SEQ_INIT;
+	coder->memlimit = my_max(1, memlimit);
+	coder->flags = flags;
+	coder->sequence = SEQ_INIT;
 
 	return LZMA_OK;
 }

src/liblzma/common/block_decoder.c

@@ -15,7 +15,7 @@
 #include "check.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum {
 		SEQ_CODE,
 		SEQ_PADDING,
@@ -48,7 +48,7 @@ struct lzma_coder_s {
 
 	/// True if the integrity check won't be calculated and verified.
 	bool ignore_check;
-};
+} lzma_block_coder;
 
 
 static inline bool
@@ -74,11 +74,13 @@ is_size_valid(lzma_vli size, lzma_vli reference)
 
 
 static lzma_ret
-block_decode(lzma_coder *coder, const lzma_allocator *allocator,
+block_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_block_coder *coder = coder_ptr;
+
 	switch (coder->sequence) {
 	case SEQ_CODE: {
 		const size_t in_start = *in_pos;
@@ -177,8 +179,9 @@ block_decode(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-block_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+block_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_block_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -198,27 +201,29 @@ lzma_block_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 			|| !lzma_vli_is_valid(block->uncompressed_size))
 		return LZMA_PROG_ERROR;
 
-	// Allocate and initialize *next->coder if needed.
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	// Allocate *next->coder if needed.
+	lzma_block_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_block_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &block_decode;
 		next->end = &block_decoder_end;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
 	// Basic initializations
-	next->coder->sequence = SEQ_CODE;
-	next->coder->block = block;
-	next->coder->compressed_size = 0;
-	next->coder->uncompressed_size = 0;
+	coder->sequence = SEQ_CODE;
+	coder->block = block;
+	coder->compressed_size = 0;
+	coder->uncompressed_size = 0;
 
 	// If Compressed Size is not known, we calculate the maximum allowed
 	// value so that encoded size of the Block (including Block Padding)
 	// is still a valid VLI and a multiple of four.
-	next->coder->compressed_limit
+	coder->compressed_limit
 			= block->compressed_size == LZMA_VLI_UNKNOWN
 				? (LZMA_VLI_MAX & ~LZMA_VLI_C(3))
 					- block->header_size
@@ -228,14 +233,14 @@ lzma_block_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 	// Initialize the check. It's caller's problem if the Check ID is not
 	// supported, and the Block decoder cannot verify the Check field.
 	// Caller can test lzma_check_is_supported(block->check).
-	next->coder->check_pos = 0;
-	lzma_check_init(&next->coder->check, block->check);
+	coder->check_pos = 0;
+	lzma_check_init(&coder->check, block->check);
 
-	next->coder->ignore_check = block->version >= 1
+	coder->ignore_check = block->version >= 1
 			? block->ignore_check : false;
 
 	// Initialize the filter chain.
-	return lzma_raw_decoder_init(&next->coder->next, allocator,
+	return lzma_raw_decoder_init(&coder->next, allocator,
 			block->filters);
 }
 

src/liblzma/common/block_encoder.c

@@ -15,7 +15,7 @@
 #include "check.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	/// The filters in the chain; initialized with lzma_raw_decoder_init().
 	lzma_next_coder next;
 
@@ -41,15 +41,17 @@ struct lzma_coder_s {
 
 	/// Check of the uncompressed data
 	lzma_check_state check;
-};
+} lzma_block_coder;
 
 
 static lzma_ret
-block_encode(lzma_coder *coder, const lzma_allocator *allocator,
+block_encode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_block_coder *coder = coder_ptr;
+
 	// Check that our amount of input stays in proper limits.
 	if (LZMA_VLI_MAX - coder->uncompressed_size < in_size - *in_pos)
 		return LZMA_DATA_ERROR;
@@ -134,8 +136,9 @@ block_encode(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-block_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+block_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_block_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -143,10 +146,12 @@ block_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-block_encoder_update(lzma_coder *coder, const lzma_allocator *allocator,
+block_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
 		const lzma_filter *filters lzma_attribute((__unused__)),
 		const lzma_filter *reversed_filters)
 {
+	lzma_block_coder *coder = coder_ptr;
+
 	if (coder->sequence != SEQ_CODE)
 		return LZMA_PROG_ERROR;
 
@@ -178,30 +183,31 @@ lzma_block_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		return LZMA_UNSUPPORTED_CHECK;
 
 	// Allocate and initialize *next->coder if needed.
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_block_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_block_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &block_encode;
 		next->end = &block_encoder_end;
 		next->update = &block_encoder_update;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
 	// Basic initializations
-	next->coder->sequence = SEQ_CODE;
-	next->coder->block = block;
-	next->coder->compressed_size = 0;
-	next->coder->uncompressed_size = 0;
-	next->coder->pos = 0;
+	coder->sequence = SEQ_CODE;
+	coder->block = block;
+	coder->compressed_size = 0;
+	coder->uncompressed_size = 0;
+	coder->pos = 0;
 
 	// Initialize the check
-	lzma_check_init(&next->coder->check, block->check);
+	lzma_check_init(&coder->check, block->check);
 
 	// Initialize the requested filters.
-	return lzma_raw_encoder_init(&next->coder->next, allocator,
-			block->filters);
+	return lzma_raw_encoder_init(&coder->next, allocator, block->filters);
 }
 
 

src/liblzma/common/common.c

@@ -435,8 +435,10 @@ lzma_memlimit_set(lzma_stream *strm, uint64_t new_memlimit)
 			|| strm->internal->next.memconfig == NULL)
 		return LZMA_PROG_ERROR;
 
-	if (new_memlimit != 0 && new_memlimit < LZMA_MEMUSAGE_BASE)
-		return LZMA_MEMLIMIT_ERROR;
+	// Zero is a special value that cannot be used as an actual limit.
+	// If 0 was specified, use 1 instead.
+	if (new_memlimit == 0)
+		new_memlimit = 1;
 
 	return strm->internal->next.memconfig(strm->internal->next.coder,
 			&memusage, &old_memlimit, new_memlimit);

src/liblzma/common/common.h

@@ -88,10 +88,6 @@
 #define LZMA_TIMED_OUT 32
 
 
-/// Type of encoder/decoder specific data; the actual structure is defined
-/// differently in different coders.
-typedef struct lzma_coder_s lzma_coder;
-
 typedef struct lzma_next_coder_s lzma_next_coder;
 
 typedef struct lzma_filter_info_s lzma_filter_info;
@@ -107,7 +103,7 @@ typedef lzma_ret (*lzma_init_function)(
 /// input and output buffers, but for simplicity they still use this same
 /// function prototype.
 typedef lzma_ret (*lzma_code_function)(
-		lzma_coder *coder, const lzma_allocator *allocator,
+		void *coder, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
@@ -115,7 +111,7 @@ typedef lzma_ret (*lzma_code_function)(
 
 /// Type of a function to free the memory allocated for the coder
 typedef void (*lzma_end_function)(
-		lzma_coder *coder, const lzma_allocator *allocator);
+		void *coder, const lzma_allocator *allocator);
 
 
 /// Raw coder validates and converts an array of lzma_filter structures to
@@ -138,7 +134,7 @@ struct lzma_filter_info_s {
 /// Hold data and function pointers of the next filter in the chain.
 struct lzma_next_coder_s {
 	/// Pointer to coder-specific data
-	lzma_coder *coder;
+	void *coder;
 
 	/// Filter ID. This is LZMA_VLI_UNKNOWN when this structure doesn't
 	/// point to a filter coder.
@@ -160,21 +156,21 @@ struct lzma_next_coder_s {
 
 	/// Pointer to a function to get progress information. If this is NULL,
 	/// lzma_stream.total_in and .total_out are used instead.
-	void (*get_progress)(lzma_coder *coder,
+	void (*get_progress)(void *coder,
 			uint64_t *progress_in, uint64_t *progress_out);
 
 	/// Pointer to function to return the type of the integrity check.
 	/// Most coders won't support this.
-	lzma_check (*get_check)(const lzma_coder *coder);
+	lzma_check (*get_check)(const void *coder);
 
 	/// Pointer to function to get and/or change the memory usage limit.
 	/// If new_memlimit == 0, the limit is not changed.
-	lzma_ret (*memconfig)(lzma_coder *coder, uint64_t *memusage,
+	lzma_ret (*memconfig)(void *coder, uint64_t *memusage,
 			uint64_t *old_memlimit, uint64_t new_memlimit);
 
 	/// Update the filter-specific options or the whole filter chain
 	/// in the encoder.
-	lzma_ret (*update)(lzma_coder *coder, const lzma_allocator *allocator,
+	lzma_ret (*update)(void *coder, const lzma_allocator *allocator,
 			const lzma_filter *filters,
 			const lzma_filter *reversed_filters);
 };

src/liblzma/common/index.c

@@ -202,22 +202,21 @@ index_tree_node_end(index_tree_node *node, const lzma_allocator *allocator,
 	if (node->right != NULL)
 		index_tree_node_end(node->right, allocator, free_func);
 
-	if (free_func != NULL)
-		free_func(node, allocator);
-
-	lzma_free(node, allocator);
+	free_func(node, allocator);
 	return;
 }
 
 
-/// Free the meory allocated for a tree. If free_func is not NULL,
-/// it is called on each node before freeing the node. This is used
-/// to free the Record groups from each index_stream before freeing
-/// the index_stream itself.
+/// Free the memory allocated for a tree. Each node is freed using the
+/// given free_func which is either &lzma_free or &index_stream_end.
+/// The latter is used to free the Record groups from each index_stream
+/// before freeing the index_stream itself.
 static void
 index_tree_end(index_tree *tree, const lzma_allocator *allocator,
 		void (*free_func)(void *node, const lzma_allocator *allocator))
 {
+	assert(free_func != NULL);
+
 	if (tree->root != NULL)
 		index_tree_node_end(tree->root, allocator, free_func);
 
@@ -371,7 +370,8 @@ static void
 index_stream_end(void *node, const lzma_allocator *allocator)
 {
 	index_stream *s = node;
-	index_tree_end(&s->groups, allocator, NULL);
+	index_tree_end(&s->groups, allocator, &lzma_free);
+	lzma_free(s, allocator);
 	return;
 }
 
@@ -829,6 +829,9 @@ lzma_index_cat(lzma_index *restrict dest, lzma_index *restrict src,
 				s->groups.rightmost = &newg->node;
 
 			lzma_free(g, allocator);
+
+			// NOTE: newg isn't leaked here because
+			// newg == (void *)&newg->node.
 		}
 	}
 
@@ -869,11 +872,8 @@ index_dup_stream(const index_stream *src, const lzma_allocator *allocator)
 	index_stream *dest = index_stream_init(src->node.compressed_base,
 			src->node.uncompressed_base, src->number,
 			src->block_number_base, allocator);
-
-	// Return immediately if allocation failed or if there are
-	// no groups to duplicate.
-	if (dest == NULL || src->groups.leftmost == NULL)
-		return dest;
+	if (dest == NULL)
+		return NULL;
 
 	// Copy the overall information.
 	dest->record_count = src->record_count;
@@ -881,6 +881,10 @@ index_dup_stream(const index_stream *src, const lzma_allocator *allocator)
 	dest->stream_flags = src->stream_flags;
 	dest->stream_padding = src->stream_padding;
 
+	// Return if there are no groups to duplicate.
+	if (src->groups.leftmost == NULL)
+		return dest;
+
 	// Allocate memory for the Records. We put all the Records into
 	// a single group. It's simplest and also tends to make
 	// lzma_index_locate() a little bit faster with very big Indexes.

src/liblzma/common/index_decoder.c

@@ -14,7 +14,7 @@
 #include "check.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum {
 		SEQ_INDICATOR,
 		SEQ_COUNT,
@@ -50,11 +50,11 @@ struct lzma_coder_s {
 
 	/// CRC32 of the List of Records field
 	uint32_t crc32;
-};
+} lzma_index_coder;
 
 
 static lzma_ret
-index_decode(lzma_coder *coder, const lzma_allocator *allocator,
+index_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size,
 		uint8_t *restrict out lzma_attribute((__unused__)),
@@ -62,6 +62,8 @@ index_decode(lzma_coder *coder, const lzma_allocator *allocator,
 		size_t out_size lzma_attribute((__unused__)),
 		lzma_action action lzma_attribute((__unused__)))
 {
+	lzma_index_coder *coder = coder_ptr;
+
 	// Similar optimization as in index_encoder.c
 	const size_t in_start = *in_pos;
 	lzma_ret ret = LZMA_OK;
@@ -207,8 +209,9 @@ out:
 
 
 static void
-index_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+index_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_index_coder *coder = coder_ptr;
 	lzma_index_end(coder->index, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -216,9 +219,11 @@ index_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-index_decoder_memconfig(lzma_coder *coder, uint64_t *memusage,
+index_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
 		uint64_t *old_memlimit, uint64_t new_memlimit)
 {
+	lzma_index_coder *coder = coder_ptr;
+
 	*memusage = lzma_index_memusage(1, coder->count);
 	*old_memlimit = coder->memlimit;
 
@@ -234,7 +239,7 @@ index_decoder_memconfig(lzma_coder *coder, uint64_t *memusage,
 
 
 static lzma_ret
-index_decoder_reset(lzma_coder *coder, const lzma_allocator *allocator,
+index_decoder_reset(lzma_index_coder *coder, const lzma_allocator *allocator,
 		lzma_index **i, uint64_t memlimit)
 {
 	// Remember the pointer given by the application. We will set it
@@ -251,7 +256,7 @@ index_decoder_reset(lzma_coder *coder, const lzma_allocator *allocator,
 
 	// Initialize the rest.
 	coder->sequence = SEQ_INDICATOR;
-	coder->memlimit = memlimit;
+	coder->memlimit = my_max(1, memlimit);
 	coder->count = 0; // Needs to be initialized due to _memconfig().
 	coder->pos = 0;
 	coder->crc32 = 0;
@@ -266,23 +271,25 @@ index_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 {
 	lzma_next_coder_init(&index_decoder_init, next, allocator);
 
-	if (i == NULL || memlimit == 0)
+	if (i == NULL)
 		return LZMA_PROG_ERROR;
 
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_index_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_index_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &index_decode;
 		next->end = &index_decoder_end;
 		next->memconfig = &index_decoder_memconfig;
-		next->coder->index = NULL;
+		coder->index = NULL;
 	} else {
-		lzma_index_end(next->coder->index, allocator);
+		lzma_index_end(coder->index, allocator);
 	}
 
-	return index_decoder_reset(next->coder, allocator, i, memlimit);
+	return index_decoder_reset(coder, allocator, i, memlimit);
 }
 
 
@@ -309,7 +316,7 @@ lzma_index_buffer_decode(lzma_index **i, uint64_t *memlimit,
 		return LZMA_PROG_ERROR;
 
 	// Initialize the decoder.
-	lzma_coder coder;
+	lzma_index_coder coder;
 	return_if_error(index_decoder_reset(&coder, allocator, i, *memlimit));
 
 	// Store the input start position so that we can restore it in case

src/liblzma/common/index_encoder.c

@@ -15,7 +15,7 @@
 #include "check.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum {
 		SEQ_INDICATOR,
 		SEQ_COUNT,
@@ -37,11 +37,11 @@ struct lzma_coder_s {
 
 	/// CRC32 of the List of Records field
 	uint32_t crc32;
-};
+} lzma_index_coder;
 
 
 static lzma_ret
-index_encode(lzma_coder *coder,
+index_encode(void *coder_ptr,
 		const lzma_allocator *allocator lzma_attribute((__unused__)),
 		const uint8_t *restrict in lzma_attribute((__unused__)),
 		size_t *restrict in_pos lzma_attribute((__unused__)),
@@ -50,6 +50,8 @@ index_encode(lzma_coder *coder,
 		size_t out_size,
 		lzma_action action lzma_attribute((__unused__)))
 {
+	lzma_index_coder *coder = coder_ptr;
+
 	// Position where to start calculating CRC32. The idea is that we
 	// need to call lzma_crc32() only once per call to index_encode().
 	const size_t out_start = *out_pos;
@@ -159,7 +161,7 @@ out:
 
 
 static void
-index_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+index_encoder_end(void *coder, const lzma_allocator *allocator)
 {
 	lzma_free(coder, allocator);
 	return;
@@ -167,7 +169,7 @@ index_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static void
-index_encoder_reset(lzma_coder *coder, const lzma_index *i)
+index_encoder_reset(lzma_index_coder *coder, const lzma_index *i)
 {
 	lzma_index_iter_init(&coder->iter, i);
 
@@ -190,7 +192,7 @@ lzma_index_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		return LZMA_PROG_ERROR;
 
 	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
+		next->coder = lzma_alloc(sizeof(lzma_index_coder), allocator);
 		if (next->coder == NULL)
 			return LZMA_MEM_ERROR;
 
@@ -230,7 +232,7 @@ lzma_index_buffer_encode(const lzma_index *i,
 
 	// The Index encoder needs just one small data structure so we can
 	// allocate it on stack.
-	lzma_coder coder;
+	lzma_index_coder coder;
 	index_encoder_reset(&coder, i);
 
 	// Do the actual encoding. This should never fail, but store

src/liblzma/common/stream_decoder.c

@@ -14,7 +14,7 @@
 #include "block_decoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum {
 		SEQ_STREAM_HEADER,
 		SEQ_BLOCK_HEADER,
@@ -80,11 +80,11 @@ struct lzma_coder_s {
 	/// Buffer to hold Stream Header, Block Header, and Stream Footer.
 	/// Block Header has biggest maximum size.
 	uint8_t buffer[LZMA_BLOCK_HEADER_SIZE_MAX];
-};
+} lzma_stream_coder;
 
 
 static lzma_ret
-stream_decoder_reset(lzma_coder *coder, const lzma_allocator *allocator)
+stream_decoder_reset(lzma_stream_coder *coder, const lzma_allocator *allocator)
 {
 	// Initialize the Index hash used to verify the Index.
 	coder->index_hash = lzma_index_hash_init(coder->index_hash, allocator);
@@ -100,11 +100,13 @@ stream_decoder_reset(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-stream_decode(lzma_coder *coder, const lzma_allocator *allocator,
+stream_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	// When decoding the actual Block, it may be able to produce more
 	// output even if we don't give it any new input.
 	while (true)
@@ -375,8 +377,9 @@ stream_decode(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-stream_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+stream_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_stream_coder *coder = coder_ptr;
 	lzma_next_end(&coder->block_decoder, allocator);
 	lzma_index_hash_end(coder->index_hash, allocator);
 	lzma_free(coder, allocator);
@@ -385,16 +388,19 @@ stream_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_check
-stream_decoder_get_check(const lzma_coder *coder)
+stream_decoder_get_check(const void *coder_ptr)
 {
+	const lzma_stream_coder *coder = coder_ptr;
 	return coder->stream_flags.check;
 }
 
 
 static lzma_ret
-stream_decoder_memconfig(lzma_coder *coder, uint64_t *memusage,
+stream_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
 		uint64_t *old_memlimit, uint64_t new_memlimit)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	*memusage = coder->memusage;
 	*old_memlimit = coder->memlimit;
 
@@ -416,37 +422,36 @@ lzma_stream_decoder_init(
 {
 	lzma_next_coder_init(&lzma_stream_decoder_init, next, allocator);
 
-	if (memlimit == 0)
-		return LZMA_PROG_ERROR;
-
 	if (flags & ~LZMA_SUPPORTED_FLAGS)
 		return LZMA_OPTIONS_ERROR;
 
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_stream_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_stream_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &stream_decode;
 		next->end = &stream_decoder_end;
 		next->get_check = &stream_decoder_get_check;
 		next->memconfig = &stream_decoder_memconfig;
 
-		next->coder->block_decoder = LZMA_NEXT_CODER_INIT;
-		next->coder->index_hash = NULL;
+		coder->block_decoder = LZMA_NEXT_CODER_INIT;
+		coder->index_hash = NULL;
 	}
 
-	next->coder->memlimit = memlimit;
-	next->coder->memusage = LZMA_MEMUSAGE_BASE;
-	next->coder->tell_no_check = (flags & LZMA_TELL_NO_CHECK) != 0;
-	next->coder->tell_unsupported_check
+	coder->memlimit = my_max(1, memlimit);
+	coder->memusage = LZMA_MEMUSAGE_BASE;
+	coder->tell_no_check = (flags & LZMA_TELL_NO_CHECK) != 0;
+	coder->tell_unsupported_check
 			= (flags & LZMA_TELL_UNSUPPORTED_CHECK) != 0;
-	next->coder->tell_any_check = (flags & LZMA_TELL_ANY_CHECK) != 0;
-	next->coder->ignore_check = (flags & LZMA_IGNORE_CHECK) != 0;
-	next->coder->concatenated = (flags & LZMA_CONCATENATED) != 0;
-	next->coder->first_stream = true;
+	coder->tell_any_check = (flags & LZMA_TELL_ANY_CHECK) != 0;
+	coder->ignore_check = (flags & LZMA_IGNORE_CHECK) != 0;
+	coder->concatenated = (flags & LZMA_CONCATENATED) != 0;
+	coder->first_stream = true;
 
-	return stream_decoder_reset(next->coder, allocator);
+	return stream_decoder_reset(coder, allocator);
 }
 
 

src/liblzma/common/stream_encoder.c

@@ -14,7 +14,7 @@
 #include "index_encoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum {
 		SEQ_STREAM_HEADER,
 		SEQ_BLOCK_INIT,
@@ -55,11 +55,11 @@ struct lzma_coder_s {
 	/// Buffer to hold Stream Header, Block Header, and Stream Footer.
 	/// Block Header has biggest maximum size.
 	uint8_t buffer[LZMA_BLOCK_HEADER_SIZE_MAX];
-};
+} lzma_stream_coder;
 
 
 static lzma_ret
-block_encoder_init(lzma_coder *coder, const lzma_allocator *allocator)
+block_encoder_init(lzma_stream_coder *coder, const lzma_allocator *allocator)
 {
 	// Prepare the Block options. Even though Block encoder doesn't need
 	// compressed_size, uncompressed_size, and header_size to be
@@ -78,11 +78,13 @@ block_encoder_init(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-stream_encode(lzma_coder *coder, const lzma_allocator *allocator,
+stream_encode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	// Main loop
 	while (*out_pos < out_size)
 	switch (coder->sequence) {
@@ -209,8 +211,10 @@ stream_encode(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-stream_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+stream_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	lzma_next_end(&coder->block_encoder, allocator);
 	lzma_next_end(&coder->index_encoder, allocator);
 	lzma_index_end(coder->index, allocator);
@@ -224,10 +228,12 @@ stream_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-stream_encoder_update(lzma_coder *coder, const lzma_allocator *allocator,
+stream_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
 		const lzma_filter *filters,
 		const lzma_filter *reversed_filters)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	if (coder->sequence <= SEQ_BLOCK_INIT) {
 		// There is no incomplete Block waiting to be finished,
 		// thus we can change the whole filter chain. Start by
@@ -271,30 +277,33 @@ stream_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 	if (filters == NULL)
 		return LZMA_PROG_ERROR;
 
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_stream_coder *coder = next->coder;
+
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_stream_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &stream_encode;
 		next->end = &stream_encoder_end;
 		next->update = &stream_encoder_update;
 
-		next->coder->filters[0].id = LZMA_VLI_UNKNOWN;
-		next->coder->block_encoder = LZMA_NEXT_CODER_INIT;
-		next->coder->index_encoder = LZMA_NEXT_CODER_INIT;
-		next->coder->index = NULL;
+		coder->filters[0].id = LZMA_VLI_UNKNOWN;
+		coder->block_encoder = LZMA_NEXT_CODER_INIT;
+		coder->index_encoder = LZMA_NEXT_CODER_INIT;
+		coder->index = NULL;
 	}
 
 	// Basic initializations
-	next->coder->sequence = SEQ_STREAM_HEADER;
-	next->coder->block_options.version = 0;
-	next->coder->block_options.check = check;
+	coder->sequence = SEQ_STREAM_HEADER;
+	coder->block_options.version = 0;
+	coder->block_options.check = check;
 
 	// Initialize the Index
-	lzma_index_end(next->coder->index, allocator);
-	next->coder->index = lzma_index_init(allocator);
-	if (next->coder->index == NULL)
+	lzma_index_end(coder->index, allocator);
+	coder->index = lzma_index_init(allocator);
+	if (coder->index == NULL)
 		return LZMA_MEM_ERROR;
 
 	// Encode the Stream Header
@@ -303,16 +312,15 @@ stream_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		.check = check,
 	};
 	return_if_error(lzma_stream_header_encode(
-			&stream_flags, next->coder->buffer));
+			&stream_flags, coder->buffer));
 
-	next->coder->buffer_pos = 0;
-	next->coder->buffer_size = LZMA_STREAM_HEADER_SIZE;
+	coder->buffer_pos = 0;
+	coder->buffer_size = LZMA_STREAM_HEADER_SIZE;
 
 	// Initialize the Block encoder. This way we detect unsupported
 	// filter chains when initializing the Stream encoder instead of
 	// giving an error after Stream Header has already written out.
-	return stream_encoder_update(
-			next->coder, allocator, filters, NULL);
+	return stream_encoder_update(coder, allocator, filters, NULL);
 }
 
 

src/liblzma/common/stream_encoder_mt.c

@@ -44,6 +44,7 @@ typedef enum {
 
 } worker_state;
 
+typedef struct lzma_stream_coder_s lzma_stream_coder;
 
 typedef struct worker_thread_s worker_thread;
 struct worker_thread_s {
@@ -65,7 +66,7 @@ struct worker_thread_s {
 
 	/// Pointer to the main structure is needed when putting this
 	/// thread back to the stack of free threads.
-	lzma_coder *coder;
+	lzma_stream_coder *coder;
 
 	/// The allocator is set by the main thread. Since a copy of the
 	/// pointer is kept here, the application must not change the
@@ -96,7 +97,7 @@ struct worker_thread_s {
 };
 
 
-struct lzma_coder_s {
+struct lzma_stream_coder_s {
 	enum {
 		SEQ_STREAM_HEADER,
 		SEQ_BLOCK,
@@ -417,7 +418,7 @@ worker_start(void *thr_ptr)
 
 /// Make the threads stop but not exit. Optionally wait for them to stop.
 static void
-threads_stop(lzma_coder *coder, bool wait_for_threads)
+threads_stop(lzma_stream_coder *coder, bool wait_for_threads)
 {
 	// Tell the threads to stop.
 	for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
@@ -446,7 +447,7 @@ threads_stop(lzma_coder *coder, bool wait_for_threads)
 /// Stop the threads and free the resources associated with them.
 /// Wait until the threads have exited.
 static void
-threads_end(lzma_coder *coder, const lzma_allocator *allocator)
+threads_end(lzma_stream_coder *coder, const lzma_allocator *allocator)
 {
 	for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
 		mythread_sync(coder->threads[i].mutex) {
@@ -468,7 +469,8 @@ threads_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 /// Initialize a new worker_thread structure and create a new thread.
 static lzma_ret
-initialize_new_thread(lzma_coder *coder, const lzma_allocator *allocator)
+initialize_new_thread(lzma_stream_coder *coder,
+		const lzma_allocator *allocator)
 {
 	worker_thread *thr = &coder->threads[coder->threads_initialized];
 
@@ -510,7 +512,7 @@ error_mutex:
 
 
 static lzma_ret
-get_thread(lzma_coder *coder, const lzma_allocator *allocator)
+get_thread(lzma_stream_coder *coder, const lzma_allocator *allocator)
 {
 	// If there are no free output subqueues, there is no
 	// point to try getting a thread.
@@ -548,7 +550,7 @@ get_thread(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-stream_encode_in(lzma_coder *coder, const lzma_allocator *allocator,
+stream_encode_in(lzma_stream_coder *coder, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, lzma_action action)
 {
@@ -616,7 +618,7 @@ stream_encode_in(lzma_coder *coder, const lzma_allocator *allocator,
 /// Wait until more input can be consumed, more output can be read, or
 /// an optional timeout is reached.
 static bool
-wait_for_work(lzma_coder *coder, mythread_condtime *wait_abs,
+wait_for_work(lzma_stream_coder *coder, mythread_condtime *wait_abs,
 		bool *has_blocked, bool has_input)
 {
 	if (coder->timeout != 0 && !*has_blocked) {
@@ -662,11 +664,13 @@ wait_for_work(lzma_coder *coder, mythread_condtime *wait_abs,
 
 
 static lzma_ret
-stream_encode_mt(lzma_coder *coder, const lzma_allocator *allocator,
+stream_encode_mt(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	switch (coder->sequence) {
 	case SEQ_STREAM_HEADER:
 		lzma_bufcpy(coder->header, &coder->header_pos,
@@ -834,8 +838,10 @@ stream_encode_mt(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-stream_encoder_mt_end(lzma_coder *coder, const lzma_allocator *allocator)
+stream_encoder_mt_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	// Threads must be killed before the output queue can be freed.
 	threads_end(coder, allocator);
 	lzma_outq_end(&coder->outq, allocator);
@@ -907,10 +913,12 @@ get_options(const lzma_mt *options, lzma_options_easy *opt_easy,
 
 
 static void
-get_progress(lzma_coder *coder, uint64_t *progress_in, uint64_t *progress_out)
+get_progress(void *coder_ptr, uint64_t *progress_in, uint64_t *progress_out)
 {
+	lzma_stream_coder *coder = coder_ptr;
+
 	// Lock coder->mutex to prevent finishing threads from moving their
-	// progress info from the worker_thread structure to lzma_coder.
+	// progress info from the worker_thread structure to lzma_stream_coder.
 	mythread_sync(coder->mutex) {
 		*progress_in = coder->progress_in;
 		*progress_out = coder->progress_out;
@@ -962,24 +970,27 @@ stream_encoder_mt_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		return LZMA_UNSUPPORTED_CHECK;
 
 	// Allocate and initialize the base structure if needed.
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_stream_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_stream_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
+
 		// For the mutex and condition variable initializations
 		// the error handling has to be done here because
 		// stream_encoder_mt_end() doesn't know if they have
 		// already been initialized or not.
-		if (mythread_mutex_init(&next->coder->mutex)) {
-			lzma_free(next->coder, allocator);
+		if (mythread_mutex_init(&coder->mutex)) {
+			lzma_free(coder, allocator);
 			next->coder = NULL;
 			return LZMA_MEM_ERROR;
 		}
 
-		if (mythread_cond_init(&next->coder->cond)) {
-			mythread_mutex_destroy(&next->coder->mutex);
-			lzma_free(next->coder, allocator);
+		if (mythread_cond_init(&coder->cond)) {
+			mythread_mutex_destroy(&coder->mutex);
+			lzma_free(coder, allocator);
 			next->coder = NULL;
 			return LZMA_MEM_ERROR;
 		}
@@ -989,76 +1000,76 @@ stream_encoder_mt_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		next->get_progress = &get_progress;
 // 		next->update = &stream_encoder_mt_update;
 
-		next->coder->filters[0].id = LZMA_VLI_UNKNOWN;
-		next->coder->index_encoder = LZMA_NEXT_CODER_INIT;
-		next->coder->index = NULL;
-		memzero(&next->coder->outq, sizeof(next->coder->outq));
-		next->coder->threads = NULL;
-		next->coder->threads_max = 0;
-		next->coder->threads_initialized = 0;
+		coder->filters[0].id = LZMA_VLI_UNKNOWN;
+		coder->index_encoder = LZMA_NEXT_CODER_INIT;
+		coder->index = NULL;
+		memzero(&coder->outq, sizeof(coder->outq));
+		coder->threads = NULL;
+		coder->threads_max = 0;
+		coder->threads_initialized = 0;
 	}
 
 	// Basic initializations
-	next->coder->sequence = SEQ_STREAM_HEADER;
-	next->coder->block_size = (size_t)(block_size);
-	next->coder->thread_error = LZMA_OK;
-	next->coder->thr = NULL;
+	coder->sequence = SEQ_STREAM_HEADER;
+	coder->block_size = (size_t)(block_size);
+	coder->thread_error = LZMA_OK;
+	coder->thr = NULL;
 
 	// Allocate the thread-specific base structures.
 	assert(options->threads > 0);
-	if (next->coder->threads_max != options->threads) {
-		threads_end(next->coder, allocator);
+	if (coder->threads_max != options->threads) {
+		threads_end(coder, allocator);
 
-		next->coder->threads = NULL;
-		next->coder->threads_max = 0;
+		coder->threads = NULL;
+		coder->threads_max = 0;
 
-		next->coder->threads_initialized = 0;
-		next->coder->threads_free = NULL;
+		coder->threads_initialized = 0;
+		coder->threads_free = NULL;
 
-		next->coder->threads = lzma_alloc(
+		coder->threads = lzma_alloc(
 				options->threads * sizeof(worker_thread),
 				allocator);
-		if (next->coder->threads == NULL)
+		if (coder->threads == NULL)
 			return LZMA_MEM_ERROR;
 
-		next->coder->threads_max = options->threads;
+		coder->threads_max = options->threads;
 	} else {
 		// Reuse the old structures and threads. Tell the running
 		// threads to stop and wait until they have stopped.
-		threads_stop(next->coder, true);
+		threads_stop(coder, true);
 	}
 
 	// Output queue
-	return_if_error(lzma_outq_init(&next->coder->outq, allocator,
+	return_if_error(lzma_outq_init(&coder->outq, allocator,
 			outbuf_size_max, options->threads));
 
 	// Timeout
-	next->coder->timeout = options->timeout;
+	coder->timeout = options->timeout;
 
 	// Free the old filter chain and copy the new one.
-	for (size_t i = 0; next->coder->filters[i].id != LZMA_VLI_UNKNOWN; ++i)
-		lzma_free(next->coder->filters[i].options, allocator);
+	for (size_t i = 0; coder->filters[i].id != LZMA_VLI_UNKNOWN; ++i)
+		lzma_free(coder->filters[i].options, allocator);
 
 	return_if_error(lzma_filters_copy(
-			filters, next->coder->filters, allocator));
+			filters, coder->filters, allocator));
 
 	// Index
-	lzma_index_end(next->coder->index, allocator);
-	next->coder->index = lzma_index_init(allocator);
-	if (next->coder->index == NULL)
+	lzma_index_end(coder->index, allocator);
+	coder->index = lzma_index_init(allocator);
+	if (coder->index == NULL)
 		return LZMA_MEM_ERROR;
 
 	// Stream Header
-	next->coder->stream_flags.version = 0;
-	next->coder->stream_flags.check = options->check;
+	coder->stream_flags.version = 0;
+	coder->stream_flags.check = options->check;
 	return_if_error(lzma_stream_header_encode(
-			&next->coder->stream_flags, next->coder->header));
+			&coder->stream_flags, coder->header));
 
-	next->coder->header_pos = 0;
+	coder->header_pos = 0;
 
 	// Progress info
-	next->coder->progress_in = 0;
-	next->coder->progress_out = LZMA_STREAM_HEADER_SIZE;
+	coder->progress_in = 0;
+	coder->progress_out = LZMA_STREAM_HEADER_SIZE;
 
 	return LZMA_OK;
 }
@@ -1111,7 +1122,8 @@ lzma_stream_encoder_mt_memusage(const lzma_mt *options)
 		return UINT64_MAX;
 
 	// Sum them with overflow checking.
-	uint64_t total_memusage = LZMA_MEMUSAGE_BASE + sizeof(lzma_coder)
+	uint64_t total_memusage = LZMA_MEMUSAGE_BASE
+			+ sizeof(lzma_stream_coder)
 			+ options->threads * sizeof(worker_thread);
 
 	if (UINT64_MAX - total_memusage < inbuf_memusage)

src/liblzma/delta/delta_common.c

@@ -15,8 +15,9 @@
 
 
 static void
-delta_coder_end(lzma_coder *coder, const lzma_allocator *allocator)
+delta_coder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_delta_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -28,14 +29,17 @@ lzma_delta_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		const lzma_filter_info *filters)
 {
 	// Allocate memory for the decoder if needed.
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_delta_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_delta_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
+
 		// End function is the same for encoder and decoder.
 		next->end = &delta_coder_end;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
 	// Validate the options.
@@ -44,15 +48,14 @@ lzma_delta_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 
 	// Set the delta distance.
 	const lzma_options_delta *opt = filters[0].options;
-	next->coder->distance = opt->dist;
+	coder->distance = opt->dist;
 
 	// Initialize the rest of the variables.
-	next->coder->pos = 0;
-	memzero(next->coder->history, LZMA_DELTA_DIST_MAX);
+	coder->pos = 0;
+	memzero(coder->history, LZMA_DELTA_DIST_MAX);
 
 	// Initialize the next decoder in the chain, if any.
-	return lzma_next_filter_init(&next->coder->next,
-			allocator, filters + 1);
+	return lzma_next_filter_init(&coder->next, allocator, filters + 1);
 }
 
 
@@ -66,5 +69,5 @@ lzma_delta_coder_memusage(const void *options)
 			|| opt->dist > LZMA_DELTA_DIST_MAX)
 		return UINT64_MAX;
 
-	return sizeof(lzma_coder);
+	return sizeof(lzma_delta_coder);
 }

src/liblzma/delta/delta_decoder.c

@@ -15,7 +15,7 @@
 
 
 static void
-decode_buffer(lzma_coder *coder, uint8_t *buffer, size_t size)
+decode_buffer(lzma_delta_coder *coder, uint8_t *buffer, size_t size)
 {
 	const size_t distance = coder->distance;
 
@@ -27,11 +27,13 @@ decode_buffer(lzma_coder *coder, uint8_t *buffer, size_t size)
 
 
 static lzma_ret
-delta_decode(lzma_coder *coder, const lzma_allocator *allocator,
+delta_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_delta_coder *coder = coder_ptr;
+
 	assert(coder->next.code != NULL);
 
 	const size_t out_start = *out_pos;

src/liblzma/delta/delta_encoder.c

@@ -18,7 +18,7 @@
 /// is the first filter in the chain (and thus the last filter in the
 /// encoder's filter stack).
 static void
-copy_and_encode(lzma_coder *coder,
+copy_and_encode(lzma_delta_coder *coder,
 		const uint8_t *restrict in, uint8_t *restrict out, size_t size)
 {
 	const size_t distance = coder->distance;
@@ -35,7 +35,7 @@ copy_and_encode(lzma_coder *coder,
 /// Encodes the data in place. This is used when we are the last filter
 /// in the chain (and thus non-last filter in the encoder's filter stack).
 static void
-encode_in_place(lzma_coder *coder, uint8_t *buffer, size_t size)
+encode_in_place(lzma_delta_coder *coder, uint8_t *buffer, size_t size)
 {
 	const size_t distance = coder->distance;
 
@@ -49,11 +49,13 @@ encode_in_place(lzma_coder *coder, uint8_t *buffer, size_t size)
 
 
 static lzma_ret
-delta_encode(lzma_coder *coder, const lzma_allocator *allocator,
+delta_encode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_delta_coder *coder = coder_ptr;
+
 	lzma_ret ret;
 
 	if (coder->next.code == NULL) {
@@ -84,10 +86,12 @@ delta_encode(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static lzma_ret
-delta_encoder_update(lzma_coder *coder, const lzma_allocator *allocator,
+delta_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
 		const lzma_filter *filters_null lzma_attribute((__unused__)),
 		const lzma_filter *reversed_filters)
 {
+	lzma_delta_coder *coder = coder_ptr;
+
 	// Delta doesn't and will never support changing the options in
 	// the middle of encoding. If the app tries to change them, we
 	// simply ignore them.

src/liblzma/delta/delta_private.h

@@ -15,7 +15,7 @@
 
 #include "delta_common.h"
 
-struct lzma_coder_s {
+typedef struct {
 	/// Next coder in the chain
 	lzma_next_coder next;
 
@@ -27,7 +27,7 @@ struct lzma_coder_s {
 
 	/// Buffer to hold history of the original data
 	uint8_t history[LZMA_DELTA_DIST_MAX];
-};
+} lzma_delta_coder;
 
 
 extern lzma_ret lzma_delta_coder_init(

src/liblzma/lz/lz_decoder.c

@@ -20,7 +20,7 @@
 #include "lz_decoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	/// Dictionary (history buffer)
 	lzma_dict dict;
 
@@ -48,7 +48,7 @@ struct lzma_coder_s {
 		size_t size;
 		uint8_t buffer[LZMA_BUFFER_SIZE];
 	} temp;
-};
+} lzma_coder;
 
 
 static void
@@ -125,13 +125,15 @@ decode_buffer(lzma_coder *coder,
 
 
 static lzma_ret
-lz_decode(lzma_coder *coder,
+lz_decode(void *coder_ptr,
 		const lzma_allocator *allocator lzma_attribute((__unused__)),
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
 		lzma_action action)
 {
+	lzma_coder *coder = coder_ptr;
+
 	if (coder->next.code == NULL)
 		return decode_buffer(coder, in, in_pos, in_size,
 				out, out_pos, out_size);
@@ -184,8 +186,10 @@ lz_decode(lzma_coder *coder,
 
 
 static void
-lz_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+lz_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_coder *coder = coder_ptr;
+
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder->dict.buf, allocator);
 
@@ -207,24 +211,26 @@ lzma_lz_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 			lzma_lz_options *lz_options))
 {
 	// Allocate the base structure if it isn't already allocated.
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &lz_decode;
 		next->end = &lz_decoder_end;
 
-		next->coder->dict.buf = NULL;
-		next->coder->dict.size = 0;
-		next->coder->lz = LZMA_LZ_DECODER_INIT;
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->dict.buf = NULL;
+		coder->dict.size = 0;
+		coder->lz = LZMA_LZ_DECODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
 	// Allocate and initialize the LZ-based decoder. It will also give
 	// us the dictionary size.
 	lzma_lz_options lz_options;
-	return_if_error(lz_init(&next->coder->lz, allocator,
+	return_if_error(lz_init(&coder->lz, allocator,
 			filters[0].options, &lz_options));
 
 	// If the dictionary size is very small, increase it to 4096 bytes.
@@ -248,14 +254,14 @@ lzma_lz_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 	lz_options.dict_size = (lz_options.dict_size + 15) & ~((size_t)(15));
 
 	// Allocate and initialize the dictionary.
-	if (next->coder->dict.size != lz_options.dict_size) {
-		lzma_free(next->coder->dict.buf, allocator);
-		next->coder->dict.buf
+	if (coder->dict.size != lz_options.dict_size) {
+		lzma_free(coder->dict.buf, allocator);
+		coder->dict.buf
 				= lzma_alloc(lz_options.dict_size, allocator);
-		if (next->coder->dict.buf == NULL)
+		if (coder->dict.buf == NULL)
 			return LZMA_MEM_ERROR;
 
-		next->coder->dict.size = lz_options.dict_size;
+		coder->dict.size = lz_options.dict_size;
 	}
 
 	lz_decoder_reset(next->coder);
@@ -268,21 +274,20 @@ lzma_lz_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		const size_t copy_size = my_min(lz_options.preset_dict_size,
 				lz_options.dict_size);
 		const size_t offset = lz_options.preset_dict_size - copy_size;
-		memcpy(next->coder->dict.buf, lz_options.preset_dict + offset,
+		memcpy(coder->dict.buf, lz_options.preset_dict + offset,
 				copy_size);
-		next->coder->dict.pos = copy_size;
-		next->coder->dict.full = copy_size;
+		coder->dict.pos = copy_size;
+		coder->dict.full = copy_size;
 	}
 
 	// Miscellaneous initializations
-	next->coder->next_finished = false;
-	next->coder->this_finished = false;
-	next->coder->temp.pos = 0;
-	next->coder->temp.size = 0;
+	coder->next_finished = false;
+	coder->this_finished = false;
+	coder->temp.pos = 0;
+	coder->temp.size = 0;
 
 	// Initialize the next filter in the chain, if any.
-	return lzma_next_filter_init(&next->coder->next, allocator,
-			filters + 1);
+	return lzma_next_filter_init(&coder->next, allocator, filters + 1);
 }
 
 
@@ -294,7 +299,8 @@ lzma_lz_decoder_memusage(size_t dictionary_size)
 
 
 extern void
-lzma_lz_decoder_uncompressed(lzma_coder *coder, lzma_vli uncompressed_size)
+lzma_lz_decoder_uncompressed(void *coder_ptr, lzma_vli uncompressed_size)
 {
+	lzma_coder *coder = coder_ptr;
 	coder->lz.set_uncompressed(coder->lz.coder, uncompressed_size);
 }

src/liblzma/lz/lz_decoder.h

@@ -53,21 +53,20 @@ typedef struct {
 
 typedef struct {
 	/// Data specific to the LZ-based decoder
-	lzma_coder *coder;
+	void *coder;
 
 	/// Function to decode from in[] to *dict
-	lzma_ret (*code)(lzma_coder *restrict coder,
+	lzma_ret (*code)(void *coder,
 			lzma_dict *restrict dict, const uint8_t *restrict in,
 			size_t *restrict in_pos, size_t in_size);
 
-	void (*reset)(lzma_coder *coder, const void *options);
+	void (*reset)(void *coder, const void *options);
 
 	/// Set the uncompressed size
-	void (*set_uncompressed)(lzma_coder *coder,
-			lzma_vli uncompressed_size);
+	void (*set_uncompressed)(void *coder, lzma_vli uncompressed_size);
 
 	/// Free allocated resources
-	void (*end)(lzma_coder *coder, const lzma_allocator *allocator);
+	void (*end)(void *coder, const lzma_allocator *allocator);
 
 } lzma_lz_decoder;
 
@@ -92,7 +91,7 @@ extern lzma_ret lzma_lz_decoder_init(lzma_next_coder *next,
 extern uint64_t lzma_lz_decoder_memusage(size_t dictionary_size);
 
 extern void lzma_lz_decoder_uncompressed(
-		lzma_coder *coder, lzma_vli uncompressed_size);
+		void *coder, lzma_vli uncompressed_size);
 
 
 //////////////////////

src/liblzma/lz/lz_encoder.c

@@ -23,7 +23,7 @@
 #include "memcmplen.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	/// LZ-based encoder e.g. LZMA
 	lzma_lz_encoder lz;
 
@@ -32,7 +32,7 @@ struct lzma_coder_s {
 
 	/// Next coder in the chain
 	lzma_next_coder next;
-};
+} lzma_coder;
 
 
 /// \brief      Moves the data in the input window to free space for new data
@@ -157,12 +157,14 @@ fill_window(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static lzma_ret
-lz_encode(lzma_coder *coder, const lzma_allocator *allocator,
+lz_encode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size,
 		uint8_t *restrict out, size_t *restrict out_pos,
 		size_t out_size, lzma_action action)
 {
+	lzma_coder *coder = coder_ptr;
+
 	while (*out_pos < out_size
 			&& (*in_pos < in_size || action != LZMA_RUN)) {
 		// Read more data to coder->mf.buffer if needed.
@@ -481,8 +483,10 @@ lzma_lz_encoder_memusage(const lzma_lz_options *lz_options)
 
 
 static void
-lz_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+lz_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_coder *coder = coder_ptr;
+
 	lzma_next_end(&coder->next, allocator);
 
 	lzma_free(coder->mf.son, allocator);
@@ -500,10 +504,12 @@ lz_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-lz_encoder_update(lzma_coder *coder, const lzma_allocator *allocator,
+lz_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
 		const lzma_filter *filters_null lzma_attribute((__unused__)),
 		const lzma_filter *reversed_filters)
 {
+	lzma_coder *coder = coder_ptr;
+
 	if (coder->lz.options_update == NULL)
 		return LZMA_PROG_ERROR;
 
@@ -528,46 +534,51 @@ lzma_lz_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 #endif
 
 	// Allocate and initialize the base data structure.
-	if (next->coder == NULL) {
-		next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (next->coder == NULL)
+	lzma_coder *coder = next->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &lz_encode;
 		next->end = &lz_encoder_end;
 		next->update = &lz_encoder_update;
 
-		next->coder->lz.coder = NULL;
-		next->coder->lz.code = NULL;
-		next->coder->lz.end = NULL;
+		coder->lz.coder = NULL;
+		coder->lz.code = NULL;
+		coder->lz.end = NULL;
 
-		next->coder->mf.buffer = NULL;
-		next->coder->mf.hash = NULL;
-		next->coder->mf.son = NULL;
-		next->coder->mf.hash_count = 0;
-		next->coder->mf.sons_count = 0;
+		// mf.size is initialized to silence Valgrind
+		// when used on optimized binaries (GCC may reorder
+		// code in a way that Valgrind gets unhappy).
+		coder->mf.buffer = NULL;
+		coder->mf.size = 0;
+		coder->mf.hash = NULL;
+		coder->mf.son = NULL;
+		coder->mf.hash_count = 0;
+		coder->mf.sons_count = 0;
 
-		next->coder->next = LZMA_NEXT_CODER_INIT;
+		coder->next = LZMA_NEXT_CODER_INIT;
 	}
 
 	// Initialize the LZ-based encoder.
 	lzma_lz_options lz_options;
-	return_if_error(lz_init(&next->coder->lz, allocator,
+	return_if_error(lz_init(&coder->lz, allocator,
 			filters[0].options, &lz_options));
 
-	// Setup the size information into next->coder->mf and deallocate
+	// Setup the size information into coder->mf and deallocate
 	// old buffers if they have wrong size.
-	if (lz_encoder_prepare(&next->coder->mf, allocator, &lz_options))
+	if (lz_encoder_prepare(&coder->mf, allocator, &lz_options))
 		return LZMA_OPTIONS_ERROR;
 
 	// Allocate new buffers if needed, and do the rest of
 	// the initialization.
-	if (lz_encoder_init(&next->coder->mf, allocator, &lz_options))
+	if (lz_encoder_init(&coder->mf, allocator, &lz_options))
 		return LZMA_MEM_ERROR;
 
 	// Initialize the next filter in the chain, if any.
-	return lzma_next_filter_init(&next->coder->next, allocator,
-			filters + 1);
+	return lzma_next_filter_init(&coder->next, allocator, filters + 1);
 }
 
 

src/liblzma/lz/lz_encoder.h

@@ -191,19 +191,18 @@ typedef struct {
 
 typedef struct {
 	/// Data specific to the LZ-based encoder
-	lzma_coder *coder;
+	void *coder;
 
 	/// Function to encode from *dict to out[]
-	lzma_ret (*code)(lzma_coder *restrict coder,
+	lzma_ret (*code)(void *coder,
 			lzma_mf *restrict mf, uint8_t *restrict out,
 			size_t *restrict out_pos, size_t out_size);
 
 	/// Free allocated resources
-	void (*end)(lzma_coder *coder, const lzma_allocator *allocator);
+	void (*end)(void *coder, const lzma_allocator *allocator);
 
 	/// Update the options in the middle of the encoding.
-	lzma_ret (*options_update)(lzma_coder *coder,
-			const lzma_filter *filter);
+	lzma_ret (*options_update)(void *coder, const lzma_filter *filter);
 
 } lzma_lz_encoder;
 

src/liblzma/lzma/Makefile.inc

@@ -9,12 +9,16 @@ EXTRA_DIST += lzma/fastpos_tablegen.c
 
 liblzma_la_SOURCES += lzma/lzma_common.h
 
+if COND_FILTER_LZMA1
+liblzma_la_SOURCES += \
+	lzma/lzma_encoder_presets.c
+endif
+
 if COND_ENCODER_LZMA1
 liblzma_la_SOURCES += \
 	lzma/fastpos.h \
 	lzma/lzma_encoder.h \
 	lzma/lzma_encoder.c \
-	lzma/lzma_encoder_presets.c \
 	lzma/lzma_encoder_private.h \
 	lzma/lzma_encoder_optimum_fast.c \
 	lzma/lzma_encoder_optimum_normal.c

src/liblzma/lzma/lzma2_decoder.c

@@ -16,7 +16,7 @@
 #include "lzma_decoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum sequence {
 		SEQ_CONTROL,
 		SEQ_UNCOMPRESSED_1,
@@ -50,14 +50,16 @@ struct lzma_coder_s {
 	bool need_dictionary_reset;
 
 	lzma_options_lzma options;
-};
+} lzma_lzma2_coder;
 
 
 static lzma_ret
-lzma2_decode(lzma_coder *restrict coder, lzma_dict *restrict dict,
+lzma2_decode(void *coder_ptr, lzma_dict *restrict dict,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size)
 {
+	lzma_lzma2_coder *restrict coder = coder_ptr;
+
 	// With SEQ_LZMA it is possible that no new input is needed to do
 	// some progress. The rest of the sequences assume that there is
 	// at least one byte of input.
@@ -209,8 +211,10 @@ lzma2_decode(lzma_coder *restrict coder, lzma_dict *restrict dict,
 
 
 static void
-lzma2_decoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+lzma2_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_lzma2_coder *coder = coder_ptr;
+
 	assert(coder->lzma.end == NULL);
 	lzma_free(coder->lzma.coder, allocator);
 
@@ -224,25 +228,27 @@ static lzma_ret
 lzma2_decoder_init(lzma_lz_decoder *lz, const lzma_allocator *allocator,
 		const void *opt, lzma_lz_options *lz_options)
 {
-	if (lz->coder == NULL) {
-		lz->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (lz->coder == NULL)
+	lzma_lzma2_coder *coder = lz->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_lzma2_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		lz->coder = coder;
 		lz->code = &lzma2_decode;
 		lz->end = &lzma2_decoder_end;
 
-		lz->coder->lzma = LZMA_LZ_DECODER_INIT;
+		coder->lzma = LZMA_LZ_DECODER_INIT;
 	}
 
 	const lzma_options_lzma *options = opt;
 
-	lz->coder->sequence = SEQ_CONTROL;
-	lz->coder->need_properties = true;
-	lz->coder->need_dictionary_reset = options->preset_dict == NULL
+	coder->sequence = SEQ_CONTROL;
+	coder->need_properties = true;
+	coder->need_dictionary_reset = options->preset_dict == NULL
 			|| options->preset_dict_size == 0;
 
-	return lzma_lzma_decoder_create(&lz->coder->lzma,
+	return lzma_lzma_decoder_create(&coder->lzma,
 			allocator, options, lz_options);
 }
 
@@ -263,7 +269,7 @@ lzma_lzma2_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 extern uint64_t
 lzma_lzma2_decoder_memusage(const void *options)
 {
-	return sizeof(lzma_coder)
+	return sizeof(lzma_lzma2_coder)
 			+ lzma_lzma_decoder_memusage_nocheck(options);
 }
 

src/liblzma/lzma/lzma2_encoder.c

@@ -17,7 +17,7 @@
 #include "lzma2_encoder.h"
 
 
-struct lzma_coder_s {
+typedef struct {
 	enum {
 		SEQ_INIT,
 		SEQ_LZMA_ENCODE,
@@ -27,7 +27,7 @@ struct lzma_coder_s {
 	} sequence;
 
 	/// LZMA encoder
-	lzma_coder *lzma;
+	void *lzma;
 
 	/// LZMA options currently in use.
 	lzma_options_lzma opt_cur;
@@ -48,11 +48,11 @@ struct lzma_coder_s {
 
 	/// Buffer to hold the chunk header and LZMA compressed data
 	uint8_t buf[LZMA2_HEADER_MAX + LZMA2_CHUNK_MAX];
-};
+} lzma_lzma2_coder;
 
 
 static void
-lzma2_header_lzma(lzma_coder *coder)
+lzma2_header_lzma(lzma_lzma2_coder *coder)
 {
 	assert(coder->uncompressed_size > 0);
 	assert(coder->uncompressed_size <= LZMA2_UNCOMPRESSED_MAX);
@@ -108,7 +108,7 @@ lzma2_header_lzma(lzma_coder *coder)
 
 
 static void
-lzma2_header_uncompressed(lzma_coder *coder)
+lzma2_header_uncompressed(lzma_lzma2_coder *coder)
 {
 	assert(coder->uncompressed_size > 0);
 	assert(coder->uncompressed_size <= LZMA2_CHUNK_MAX);
@@ -133,10 +133,12 @@ lzma2_header_uncompressed(lzma_coder *coder)
 
 
 static lzma_ret
-lzma2_encode(lzma_coder *restrict coder, lzma_mf *restrict mf,
+lzma2_encode(void *coder_ptr, lzma_mf *restrict mf,
 		uint8_t *restrict out, size_t *restrict out_pos,
 		size_t out_size)
 {
+	lzma_lzma2_coder *restrict coder = coder_ptr;
+
 	while (*out_pos < out_size)
 	switch (coder->sequence) {
 	case SEQ_INIT:
@@ -262,8 +264,9 @@ lzma2_encode(lzma_coder *restrict coder, lzma_mf *restrict mf,
 
 
 static void
-lzma2_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
+lzma2_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_lzma2_coder *coder = coder_ptr;
 	lzma_free(coder->lzma, allocator);
 	lzma_free(coder, allocator);
 	return;
@@ -271,8 +274,10 @@ lzma2_encoder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-lzma2_encoder_options_update(lzma_coder *coder, const lzma_filter *filter)
+lzma2_encoder_options_update(void *coder_ptr, const lzma_filter *filter)
 {
+	lzma_lzma2_coder *coder = coder_ptr;
+
 	// New options can be set only when there is no incomplete chunk.
 	// This is the case at the beginning of the raw stream and right
 	// after LZMA_SYNC_FLUSH.
@@ -310,30 +315,32 @@ lzma2_encoder_init(lzma_lz_encoder *lz, const lzma_allocator *allocator,
 	if (options == NULL)
 		return LZMA_PROG_ERROR;
 
-	if (lz->coder == NULL) {
-		lz->coder = lzma_alloc(sizeof(lzma_coder), allocator);
-		if (lz->coder == NULL)
+	lzma_lzma2_coder *coder = lz->coder;
+	if (coder == NULL) {
+		coder = lzma_alloc(sizeof(lzma_lzma2_coder), allocator);
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		lz->coder = coder;
 		lz->code = &lzma2_encode;
 		lz->end = &lzma2_encoder_end;
 		lz->options_update = &lzma2_encoder_options_update;
 
-		lz->coder->lzma = NULL;
+		coder->lzma = NULL;
 	}
 
-	lz->coder->opt_cur = *(const lzma_options_lzma *)(options);
+	coder->opt_cur = *(const lzma_options_lzma *)(options);
 
-	lz->coder->sequence = SEQ_INIT;
-	lz->coder->need_properties = true;
-	lz->coder->need_state_reset = false;
-	lz->coder->need_dictionary_reset
-			= lz->coder->opt_cur.preset_dict == NULL
-			|| lz->coder->opt_cur.preset_dict_size == 0;
+	coder->sequence = SEQ_INIT;
+	coder->need_properties = true;
+	coder->need_state_reset = false;
+	coder->need_dictionary_reset
+			= coder->opt_cur.preset_dict == NULL
+			|| coder->opt_cur.preset_dict_size == 0;
 
 	// Initialize LZMA encoder
-	return_if_error(lzma_lzma_encoder_create(&lz->coder->lzma, allocator,
-			&lz->coder->opt_cur, lz_options));
+	return_if_error(lzma_lzma_encoder_create(&coder->lzma, allocator,
+			&coder->opt_cur, lz_options));
 
 	// Make sure that we will always have enough history available in
 	// case we need to use uncompressed chunks. They are used when the
@@ -364,7 +371,7 @@ lzma_lzma2_encoder_memusage(const void *options)
 	if (lzma_mem == UINT64_MAX)
 		return UINT64_MAX;
 
-	return sizeof(lzma_coder) + lzma_mem;
+	return sizeof(lzma_lzma2_coder) + lzma_mem;
 }
 
 

src/liblzma/lzma/lzma_decoder.c

@@ -16,6 +16,12 @@
 #include "lzma_decoder.h"
 #include "range_decoder.h"
 
+// The macros unroll loops with switch statements.
+// Silence warnings about missing fall-through comments.
+#if TUKLIB_GNUC_REQ(7, 0)
+#	pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
+
 
 #ifdef HAVE_SMALL
 
@@ -161,7 +167,7 @@ typedef struct {
 } lzma_length_decoder;
 
 
-struct lzma_coder_s {
+typedef struct {
 	///////////////////
 	// Probabilities //
 	///////////////////
@@ -277,14 +283,16 @@ struct lzma_coder_s {
 	/// If decoding a literal: match byte.
 	/// If decoding a match: length of the match.
 	uint32_t len;
-};
+} lzma_lzma1_decoder;
 
 
 static lzma_ret
-lzma_decode(lzma_coder *restrict coder, lzma_dict *restrict dictptr,
+lzma_decode(void *coder_ptr, lzma_dict *restrict dictptr,
 		const uint8_t *restrict in,
 		size_t *restrict in_pos, size_t in_size)
 {
+	lzma_lzma1_decoder *restrict coder = coder_ptr;
+
 	////////////////////
 	// Initialization //
 	////////////////////
@@ -840,23 +848,17 @@ out:
 
 
 static void
-lzma_decoder_uncompressed(lzma_coder *coder, lzma_vli uncompressed_size)
+lzma_decoder_uncompressed(void *coder_ptr, lzma_vli uncompressed_size)
 {
+	lzma_lzma1_decoder *coder = coder_ptr;
 	coder->uncompressed_size = uncompressed_size;
 }
 
-/*
-extern void
-lzma_lzma_decoder_uncompressed(void *coder_ptr, lzma_vli uncompressed_size)
-{
-	// This is hack.
-	(*(lzma_coder **)(coder))->uncompressed_size = uncompressed_size;
-}
-*/
 
 static void
-lzma_decoder_reset(lzma_coder *coder, const void *opt)
+lzma_decoder_reset(void *coder_ptr, const void *opt)
 {
+	lzma_lzma1_decoder *coder = coder_ptr;
 	const lzma_options_lzma *options = opt;
 
 	// NOTE: We assume that lc/lp/pb are valid since they were
@@ -941,7 +943,7 @@ lzma_lzma_decoder_create(lzma_lz_decoder *lz, const lzma_allocator *allocator,
 		const void *opt, lzma_lz_options *lz_options)
 {
 	if (lz->coder == NULL) {
-		lz->coder = lzma_alloc(sizeof(lzma_coder), allocator);
+		lz->coder = lzma_alloc(sizeof(lzma_lzma1_decoder), allocator);
 		if (lz->coder == NULL)
 			return LZMA_MEM_ERROR;
 
@@ -1014,7 +1016,8 @@ extern uint64_t
 lzma_lzma_decoder_memusage_nocheck(const void *options)
 {
 	const lzma_options_lzma *const opt = options;
-	return sizeof(lzma_coder) + lzma_lz_decoder_memusage(opt->dict_size);
+	return sizeof(lzma_lzma1_decoder)
+			+ lzma_lz_decoder_memusage(opt->dict_size);
 }
 
 

src/liblzma/lzma/lzma_encoder.c

@@ -43,7 +43,7 @@ literal_matched(lzma_range_encoder *rc, probability *subcoder,
 
 
 static inline void
-literal(lzma_coder *coder, lzma_mf *mf, uint32_t position)
+literal(lzma_lzma1_encoder *coder, lzma_mf *mf, uint32_t position)
 {
 	// Locate the literal byte to be encoded and the subcoder.
 	const uint8_t cur_byte = mf->buffer[
@@ -140,7 +140,7 @@ length(lzma_range_encoder *rc, lzma_length_encoder *lc,
 ///////////
 
 static inline void
-match(lzma_coder *coder, const uint32_t pos_state,
+match(lzma_lzma1_encoder *coder, const uint32_t pos_state,
 		const uint32_t distance, const uint32_t len)
 {
 	update_match(coder->state);
@@ -187,7 +187,7 @@ match(lzma_coder *coder, const uint32_t pos_state,
 ////////////////////
 
 static inline void
-rep_match(lzma_coder *coder, const uint32_t pos_state,
+rep_match(lzma_lzma1_encoder *coder, const uint32_t pos_state,
 		const uint32_t rep, const uint32_t len)
 {
 	if (rep == 0) {
@@ -231,7 +231,7 @@ rep_match(lzma_coder *coder, const uint32_t pos_state,
 //////////
 
 static void
-encode_symbol(lzma_coder *coder, lzma_mf *mf,
+encode_symbol(lzma_lzma1_encoder *coder, lzma_mf *mf,
 		uint32_t back, uint32_t len, uint32_t position)
 {
 	const uint32_t pos_state = position & coder->pos_mask;
@@ -265,7 +265,7 @@ encode_symbol(lzma_coder *coder, lzma_mf *mf,
 
 
 static bool
-encode_init(lzma_coder *coder, lzma_mf *mf)
+encode_init(lzma_lzma1_encoder *coder, lzma_mf *mf)
 {
 	assert(mf_position(mf) == 0);
 
@@ -293,7 +293,7 @@ encode_init(lzma_coder *coder, lzma_mf *mf)
 
 
 static void
-encode_eopm(lzma_coder *coder, uint32_t position)
+encode_eopm(lzma_lzma1_encoder *coder, uint32_t position)
 {
 	const uint32_t pos_state = position & coder->pos_mask;
 	rc_bit(&coder->rc, &coder->is_match[coder->state][pos_state], 1);
@@ -309,7 +309,7 @@ encode_eopm(lzma_coder *coder, uint32_t position)
 
 
 extern lzma_ret
-lzma_lzma_encode(lzma_coder *restrict coder, lzma_mf *restrict mf,
+lzma_lzma_encode(lzma_lzma1_encoder *restrict coder, lzma_mf *restrict mf,
 		uint8_t *restrict out, size_t *restrict out_pos,
 		size_t out_size, uint32_t limit)
 {
@@ -402,7 +402,7 @@ lzma_lzma_encode(lzma_coder *restrict coder, lzma_mf *restrict mf,
 
 
 static lzma_ret
-lzma_encode(lzma_coder *restrict coder, lzma_mf *restrict mf,
+lzma_encode(void *coder, lzma_mf *restrict mf,
 		uint8_t *restrict out, size_t *restrict out_pos,
 		size_t out_size)
 {
@@ -473,7 +473,8 @@ length_encoder_reset(lzma_length_encoder *lencoder,
 
 
 extern lzma_ret
-lzma_lzma_encoder_reset(lzma_coder *coder, const lzma_options_lzma *options)
+lzma_lzma_encoder_reset(lzma_lzma1_encoder *coder,
+		const lzma_options_lzma *options)
 {
 	if (!is_options_valid(options))
 		return LZMA_OPTIONS_ERROR;
@@ -545,18 +546,18 @@ lzma_lzma_encoder_reset(lzma_coder *coder, const lzma_options_lzma *options)
 
 
 extern lzma_ret
-lzma_lzma_encoder_create(lzma_coder **coder_ptr,
+lzma_lzma_encoder_create(void **coder_ptr,
 		const lzma_allocator *allocator,
 		const lzma_options_lzma *options, lzma_lz_options *lz_options)
 {
-	// Allocate lzma_coder if it wasn't already allocated.
+	// Allocate lzma_lzma1_encoder if it wasn't already allocated.
 	if (*coder_ptr == NULL) {
-		*coder_ptr = lzma_alloc(sizeof(lzma_coder), allocator);
+		*coder_ptr = lzma_alloc(sizeof(lzma_lzma1_encoder), allocator);
 		if (*coder_ptr == NULL)
 			return LZMA_MEM_ERROR;
 	}
 
-	lzma_coder *coder = *coder_ptr;
+	lzma_lzma1_encoder *coder = *coder_ptr;
 
 	// Set compression mode. We haven't validates the options yet,
 	// but it's OK here, since nothing bad happens with invalid
@@ -636,7 +637,7 @@ lzma_lzma_encoder_memusage(const void *options)
 	if (lz_memusage == UINT64_MAX)
 		return UINT64_MAX;
 
-	return (uint64_t)(sizeof(lzma_coder)) + lz_memusage;
+	return (uint64_t)(sizeof(lzma_lzma1_encoder)) + lz_memusage;
 }
 
 

src/liblzma/lzma/lzma_encoder.h

@@ -17,6 +17,9 @@
 #include "common.h"
 
 
+typedef struct lzma_lzma1_encoder_s lzma_lzma1_encoder;
+
+
 extern lzma_ret lzma_lzma_encoder_init(lzma_next_coder *next,
 		const lzma_allocator *allocator,
 		const lzma_filter_info *filters);
@@ -36,16 +39,16 @@ extern bool lzma_lzma_lclppb_encode(
 
 /// Initializes raw LZMA encoder; this is used by LZMA2.
 extern lzma_ret lzma_lzma_encoder_create(
-		lzma_coder **coder_ptr, const lzma_allocator *allocator,
+		void **coder_ptr, const lzma_allocator *allocator,
 		const lzma_options_lzma *options, lzma_lz_options *lz_options);
 
 
 /// Resets an already initialized LZMA encoder; this is used by LZMA2.
 extern lzma_ret lzma_lzma_encoder_reset(
-		lzma_coder *coder, const lzma_options_lzma *options);
+		lzma_lzma1_encoder *coder, const lzma_options_lzma *options);
 
 
-extern lzma_ret lzma_lzma_encode(lzma_coder *restrict coder,
+extern lzma_ret lzma_lzma_encode(lzma_lzma1_encoder *restrict coder,
 		lzma_mf *restrict mf, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
 		uint32_t read_limit);

src/liblzma/lzma/lzma_encoder_optimum_fast.c

@@ -18,7 +18,8 @@
 
 
 extern void
-lzma_lzma_optimum_fast(lzma_coder *restrict coder, lzma_mf *restrict mf,
+lzma_lzma_optimum_fast(lzma_lzma1_encoder *restrict coder,
+		lzma_mf *restrict mf,
 		uint32_t *restrict back_res, uint32_t *restrict len_res)
 {
 	const uint32_t nice_len = mf->nice_len;

src/liblzma/lzma/lzma_encoder_optimum_normal.c

@@ -19,7 +19,7 @@
 ////////////
 
 static uint32_t
-get_literal_price(const lzma_coder *const coder, const uint32_t pos,
+get_literal_price(const lzma_lzma1_encoder *const coder, const uint32_t pos,
 		const uint32_t prev_byte, const bool match_mode,
 		uint32_t match_byte, uint32_t symbol)
 {
@@ -65,7 +65,7 @@ get_len_price(const lzma_length_encoder *const lencoder,
 
 
 static inline uint32_t
-get_short_rep_price(const lzma_coder *const coder,
+get_short_rep_price(const lzma_lzma1_encoder *const coder,
 		const lzma_lzma_state state, const uint32_t pos_state)
 {
 	return rc_bit_0_price(coder->is_rep0[state])
@@ -74,7 +74,7 @@ get_short_rep_price(const lzma_coder *const coder,
 
 
 static inline uint32_t
-get_pure_rep_price(const lzma_coder *const coder, const uint32_t rep_index,
+get_pure_rep_price(const lzma_lzma1_encoder *const coder, const uint32_t rep_index,
 		const lzma_lzma_state state, uint32_t pos_state)
 {
 	uint32_t price;
@@ -99,7 +99,7 @@ get_pure_rep_price(const lzma_coder *const coder, const uint32_t rep_index,
 
 
 static inline uint32_t
-get_rep_price(const lzma_coder *const coder, const uint32_t rep_index,
+get_rep_price(const lzma_lzma1_encoder *const coder, const uint32_t rep_index,
 		const uint32_t len, const lzma_lzma_state state,
 		const uint32_t pos_state)
 {
@@ -109,7 +109,7 @@ get_rep_price(const lzma_coder *const coder, const uint32_t rep_index,
 
 
 static inline uint32_t
-get_dist_len_price(const lzma_coder *const coder, const uint32_t dist,
+get_dist_len_price(const lzma_lzma1_encoder *const coder, const uint32_t dist,
 		const uint32_t len, const uint32_t pos_state)
 {
 	const uint32_t dist_state = get_dist_state(len);
@@ -130,7 +130,7 @@ get_dist_len_price(const lzma_coder *const coder, const uint32_t dist,
 
 
 static void
-fill_dist_prices(lzma_coder *coder)
+fill_dist_prices(lzma_lzma1_encoder *coder)
 {
 	for (uint32_t dist_state = 0; dist_state < DIST_STATES; ++dist_state) {
 
@@ -185,7 +185,7 @@ fill_dist_prices(lzma_coder *coder)
 
 
 static void
-fill_align_prices(lzma_coder *coder)
+fill_align_prices(lzma_lzma1_encoder *coder)
 {
 	for (uint32_t i = 0; i < ALIGN_SIZE; ++i)
 		coder->align_prices[i] = rc_bittree_reverse_price(
@@ -221,7 +221,7 @@ make_short_rep(lzma_optimal *optimal)
 
 
 static void
-backward(lzma_coder *restrict coder, uint32_t *restrict len_res,
+backward(lzma_lzma1_encoder *restrict coder, uint32_t *restrict len_res,
 		uint32_t *restrict back_res, uint32_t cur)
 {
 	coder->opts_end_index = cur;
@@ -269,7 +269,7 @@ backward(lzma_coder *restrict coder, uint32_t *restrict len_res,
 //////////
 
 static inline uint32_t
-helper1(lzma_coder *restrict coder, lzma_mf *restrict mf,
+helper1(lzma_lzma1_encoder *restrict coder, lzma_mf *restrict mf,
 		uint32_t *restrict back_res, uint32_t *restrict len_res,
 		uint32_t position)
 {
@@ -441,7 +441,7 @@ helper1(lzma_coder *restrict coder, lzma_mf *restrict mf,
 
 
 static inline uint32_t
-helper2(lzma_coder *coder, uint32_t *reps, const uint8_t *buf,
+helper2(lzma_lzma1_encoder *coder, uint32_t *reps, const uint8_t *buf,
 		uint32_t len_end, uint32_t position, const uint32_t cur,
 		const uint32_t nice_len, const uint32_t buf_avail_full)
 {
@@ -797,7 +797,8 @@ helper2(lzma_coder *coder, uint32_t *reps, const uint8_t *buf,
 
 
 extern void
-lzma_lzma_optimum_normal(lzma_coder *restrict coder, lzma_mf *restrict mf,
+lzma_lzma_optimum_normal(lzma_lzma1_encoder *restrict coder,
+		lzma_mf *restrict mf,
 		uint32_t *restrict back_res, uint32_t *restrict len_res,
 		uint32_t position)
 {

src/liblzma/lzma/lzma_encoder_presets.c

@@ -2,6 +2,7 @@
 //
 /// \file       lzma_encoder_presets.c
 /// \brief      Encoder presets
+/// \note       xz needs this even when only decoding is enabled.
 //
 //  Author:     Lasse Collin
 //

src/liblzma/lzma/lzma_encoder_private.h

@@ -69,7 +69,7 @@ typedef struct {
 } lzma_optimal;
 
 
-struct lzma_coder_s {
+struct lzma_lzma1_encoder_s {
 	/// Range encoder
 	lzma_range_encoder rc;
 
@@ -138,10 +138,10 @@ struct lzma_coder_s {
 
 
 extern void lzma_lzma_optimum_fast(
-		lzma_coder *restrict coder, lzma_mf *restrict mf,
+		lzma_lzma1_encoder *restrict coder, lzma_mf *restrict mf,
 		uint32_t *restrict back_res, uint32_t *restrict len_res);
 
-extern void lzma_lzma_optimum_normal(lzma_coder *restrict coder,
+extern void lzma_lzma_optimum_normal(lzma_lzma1_encoder *restrict coder,
 		lzma_mf *restrict mf, uint32_t *restrict back_res,
 		uint32_t *restrict len_res, uint32_t position);
 

src/liblzma/rangecoder/range_common.h

@@ -14,9 +14,7 @@
 #ifndef LZMA_RANGE_COMMON_H
 #define LZMA_RANGE_COMMON_H
 
-#ifdef HAVE_CONFIG_H
-#	include "common.h"
-#endif
+#include "common.h"
 
 
 ///////////////

src/liblzma/simple/arm.c

@@ -15,7 +15,7 @@
 
 
 static size_t
-arm_code(lzma_simple *simple lzma_attribute((__unused__)),
+arm_code(void *simple lzma_attribute((__unused__)),
 		uint32_t now_pos, bool is_encoder,
 		uint8_t *buffer, size_t size)
 {

src/liblzma/simple/armthumb.c

@@ -15,7 +15,7 @@
 
 
 static size_t
-armthumb_code(lzma_simple *simple lzma_attribute((__unused__)),
+armthumb_code(void *simple lzma_attribute((__unused__)),
 		uint32_t now_pos, bool is_encoder,
 		uint8_t *buffer, size_t size)
 {

src/liblzma/simple/ia64.c

@@ -15,7 +15,7 @@
 
 
 static size_t
-ia64_code(lzma_simple *simple lzma_attribute((__unused__)),
+ia64_code(void *simple lzma_attribute((__unused__)),
 		uint32_t now_pos, bool is_encoder,
 		uint8_t *buffer, size_t size)
 {

src/liblzma/simple/powerpc.c

@@ -15,7 +15,7 @@
 
 
 static size_t
-powerpc_code(lzma_simple *simple lzma_attribute((__unused__)),
+powerpc_code(void *simple lzma_attribute((__unused__)),
 		uint32_t now_pos, bool is_encoder,
 		uint8_t *buffer, size_t size)
 {

src/liblzma/simple/simple_coder.c

@@ -18,7 +18,7 @@
 
 /// Copied or encodes/decodes more data to out[].
 static lzma_ret
-copy_or_code(lzma_coder *coder, const lzma_allocator *allocator,
+copy_or_code(lzma_simple_coder *coder, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
@@ -55,7 +55,7 @@ copy_or_code(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static size_t
-call_filter(lzma_coder *coder, uint8_t *buffer, size_t size)
+call_filter(lzma_simple_coder *coder, uint8_t *buffer, size_t size)
 {
 	const size_t filtered = coder->filter(coder->simple,
 			coder->now_pos, coder->is_encoder,
@@ -66,11 +66,13 @@ call_filter(lzma_coder *coder, uint8_t *buffer, size_t size)
 
 
 static lzma_ret
-simple_code(lzma_coder *coder, const lzma_allocator *allocator,
+simple_code(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size, lzma_action action)
 {
+	lzma_simple_coder *coder = coder_ptr;
+
 	// TODO: Add partial support for LZMA_SYNC_FLUSH. We can support it
 	// in cases when the filter is able to filter everything. With most
 	// simple filters it can be done at offset that is a multiple of 2,
@@ -198,8 +200,9 @@ simple_code(lzma_coder *coder, const lzma_allocator *allocator,
 
 
 static void
-simple_coder_end(lzma_coder *coder, const lzma_allocator *allocator)
+simple_coder_end(void *coder_ptr, const lzma_allocator *allocator)
 {
+	lzma_simple_coder *coder = coder_ptr;
 	lzma_next_end(&coder->next, allocator);
 	lzma_free(coder->simple, allocator);
 	lzma_free(coder, allocator);
@@ -208,10 +211,12 @@ simple_coder_end(lzma_coder *coder, const lzma_allocator *allocator)
 
 
 static lzma_ret
-simple_coder_update(lzma_coder *coder, const lzma_allocator *allocator,
+simple_coder_update(void *coder_ptr, const lzma_allocator *allocator,
 		const lzma_filter *filters_null lzma_attribute((__unused__)),
 		const lzma_filter *reversed_filters)
 {
+	lzma_simple_coder *coder = coder_ptr;
+
 	// No update support, just call the next filter in the chain.
 	return lzma_next_filter_update(
 			&coder->next, allocator, reversed_filters + 1);
@@ -221,57 +226,57 @@ simple_coder_update(lzma_coder *coder, const lzma_allocator *allocator,
 extern lzma_ret
 lzma_simple_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		const lzma_filter_info *filters,
-		size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
+		size_t (*filter)(void *simple, uint32_t now_pos,
 			bool is_encoder, uint8_t *buffer, size_t size),
 		size_t simple_size, size_t unfiltered_max,
 		uint32_t alignment, bool is_encoder)
 {
-	// Allocate memory for the lzma_coder structure if needed.
-	if (next->coder == NULL) {
+	// Allocate memory for the lzma_simple_coder structure if needed.
+	lzma_simple_coder *coder = next->coder;
+	if (coder == NULL) {
 		// Here we allocate space also for the temporary buffer. We
 		// need twice the size of unfiltered_max, because then it
 		// is always possible to filter at least unfiltered_max bytes
 		// more data in coder->buffer[] if it can be filled completely.
-		next->coder = lzma_alloc(sizeof(lzma_coder)
+		coder = lzma_alloc(sizeof(lzma_simple_coder)
 				+ 2 * unfiltered_max, allocator);
-		if (next->coder == NULL)
+		if (coder == NULL)
 			return LZMA_MEM_ERROR;
 
+		next->coder = coder;
 		next->code = &simple_code;
 		next->end = &simple_coder_end;
 		next->update = &simple_coder_update;
 
-		next->coder->next = LZMA_NEXT_CODER_INIT;
-		next->coder->filter = filter;
-		next->coder->allocated = 2 * unfiltered_max;
+		coder->next = LZMA_NEXT_CODER_INIT;
+		coder->filter = filter;
+		coder->allocated = 2 * unfiltered_max;
 
 		// Allocate memory for filter-specific data structure.
 		if (simple_size > 0) {
-			next->coder->simple = lzma_alloc(
-					simple_size, allocator);
-			if (next->coder->simple == NULL)
+			coder->simple = lzma_alloc(simple_size, allocator);
+			if (coder->simple == NULL)
 				return LZMA_MEM_ERROR;
 		} else {
-			next->coder->simple = NULL;
+			coder->simple = NULL;
 		}
 	}
 
 	if (filters[0].options != NULL) {
 		const lzma_options_bcj *simple = filters[0].options;
-		next->coder->now_pos = simple->start_offset;
-		if (next->coder->now_pos & (alignment - 1))
+		coder->now_pos = simple->start_offset;
+		if (coder->now_pos & (alignment - 1))
 			return LZMA_OPTIONS_ERROR;
 	} else {
-		next->coder->now_pos = 0;
+		coder->now_pos = 0;
 	}
 
 	// Reset variables.
-	next->coder->is_encoder = is_encoder;
-	next->coder->end_was_reached = false;
-	next->coder->pos = 0;
-	next->coder->filtered = 0;
-	next->coder->size = 0;
+	coder->is_encoder = is_encoder;
+	coder->end_was_reached = false;
+	coder->pos = 0;
+	coder->filtered = 0;
+	coder->size = 0;
 
-	return lzma_next_filter_init(
-			&next->coder->next, allocator, filters + 1);
+	return lzma_next_filter_init(&coder->next, allocator, filters + 1);
 }

src/liblzma/simple/simple_private.h

@@ -16,9 +16,7 @@
 #include "simple_coder.h"
 
 
-typedef struct lzma_simple_s lzma_simple;
-
-struct lzma_coder_s {
+typedef struct {
 	/// Next filter in the chain
 	lzma_next_coder next;
 
@@ -33,12 +31,12 @@ struct lzma_coder_s {
 
 	/// Pointer to filter-specific function, which does
 	/// the actual filtering.
-	size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
+	size_t (*filter)(void *simple, uint32_t now_pos,
 			bool is_encoder, uint8_t *buffer, size_t size);
 
 	/// Pointer to filter-specific data, or NULL if filter doesn't need
 	/// any extra data.
-	lzma_simple *simple;
+	void *simple;
 
 	/// The lowest 32 bits of the current position in the data. Most
 	/// filters need this to do conversions between absolute and relative
@@ -62,13 +60,13 @@ struct lzma_coder_s {
 
 	/// Temporary buffer
 	uint8_t buffer[];
-};
+} lzma_simple_coder;
 
 
 extern lzma_ret lzma_simple_coder_init(lzma_next_coder *next,
 		const lzma_allocator *allocator,
 		const lzma_filter_info *filters,
-		size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
+		size_t (*filter)(void *simple, uint32_t now_pos,
 			bool is_encoder, uint8_t *buffer, size_t size),
 		size_t simple_size, size_t unfiltered_max,
 		uint32_t alignment, bool is_encoder);

src/liblzma/simple/sparc.c

@@ -15,7 +15,7 @@
 
 
 static size_t
-sparc_code(lzma_simple *simple lzma_attribute((__unused__)),
+sparc_code(void *simple lzma_attribute((__unused__)),
 		uint32_t now_pos, bool is_encoder,
 		uint8_t *buffer, size_t size)
 {

src/liblzma/simple/x86.c

@@ -17,14 +17,14 @@
 #define Test86MSByte(b) ((b) == 0 || (b) == 0xFF)
 
 
-struct lzma_simple_s {
+typedef struct {
 	uint32_t prev_mask;
 	uint32_t prev_pos;
-};
+} lzma_simple_x86;
 
 
 static size_t
-x86_code(lzma_simple *simple, uint32_t now_pos, bool is_encoder,
+x86_code(void *simple_ptr, uint32_t now_pos, bool is_encoder,
 		uint8_t *buffer, size_t size)
 {
 	static const bool MASK_TO_ALLOWED_STATUS[8]
@@ -33,6 +33,7 @@ x86_code(lzma_simple *simple, uint32_t now_pos, bool is_encoder,
 	static const uint32_t MASK_TO_BIT_NUMBER[8]
 			= { 0, 1, 2, 2, 3, 3, 3, 3 };
 
+	lzma_simple_x86 *simple = simple_ptr;
 	uint32_t prev_mask = simple->prev_mask;
 	uint32_t prev_pos = simple->prev_pos;
 
@@ -127,11 +128,13 @@ x86_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
 		const lzma_filter_info *filters, bool is_encoder)
 {
 	const lzma_ret ret = lzma_simple_coder_init(next, allocator, filters,
-			&x86_code, sizeof(lzma_simple), 5, 1, is_encoder);
+			&x86_code, sizeof(lzma_simple_x86), 5, 1, is_encoder);
 
 	if (ret == LZMA_OK) {
-		next->coder->simple->prev_mask = 0;
-		next->coder->simple->prev_pos = (uint32_t)(-5);
+		lzma_simple_coder *coder = next->coder;
+		lzma_simple_x86 *simple = coder->simple;
+		simple->prev_mask = 0;
+		simple->prev_pos = (uint32_t)(-5);
 	}
 
 	return ret;

src/xz/Makefile.am

@@ -16,8 +16,6 @@ xz_SOURCES = \
 	file_io.h \
 	hardware.c \
 	hardware.h \
-	list.c \
-	list.h \
 	main.c \
 	main.h \
 	message.c \
@@ -39,6 +37,12 @@ xz_SOURCES = \
 	../common/tuklib_mbstr_width.c \
 	../common/tuklib_mbstr_fw.c
 
+if COND_MAIN_DECODER
+xz_SOURCES += \
+	list.c \
+	list.h
+endif
+
 if COND_W32
 xz_SOURCES += xz_w32res.rc
 endif
@@ -49,7 +53,7 @@ xz_CPPFLAGS = \
 	-I$(top_srcdir)/src/liblzma/api \
 	-I$(top_builddir)/lib
 
-xz_LDADD = $(top_builddir)/src/liblzma/liblzma.la
+xz_LDADD = $(top_builddir)/src/liblzma/liblzma.la $(CAPSICUM_LIB)
 
 if COND_GNULIB
 xz_LDADD += $(top_builddir)/lib/libgnu.a

src/xz/args.c

@@ -635,6 +635,22 @@ args_parse(args_info *args, int argc, char **argv)
 	// Then from the command line
 	parse_real(args, argc, argv);
 
+	// If encoder or decoder support was omitted at build time,
+	// show an error now so that the rest of the code can rely on
+	// that whatever is in opt_mode is also supported.
+#ifndef HAVE_ENCODERS
+	if (opt_mode == MODE_COMPRESS)
+		message_fatal(_("Compression support was disabled "
+				"at build time"));
+#endif
+#ifndef HAVE_DECODERS
+	// Even MODE_LIST cannot work without decoder support so MODE_COMPRESS
+	// is the only valid choice.
+	if (opt_mode != MODE_COMPRESS)
+		message_fatal(_("Decompression support was disabled "
+				"at build time"));
+#endif
+
 	// Never remove the source file when the destination is not on disk.
 	// In test mode the data is written nowhere, but setting opt_stdout
 	// will make the rest of the code behave well.

src/xz/coder.c

@@ -51,7 +51,7 @@ static lzma_check check;
 /// This becomes false if the --check=CHECK option is used.
 static bool check_default = true;
 
-#ifdef MYTHREAD_ENABLED
+#if defined(HAVE_ENCODERS) && defined(MYTHREAD_ENABLED)
 static lzma_mt mt_options = {
 	.flags = 0,
 	.timeout = 300,
@@ -221,9 +221,10 @@ coder_set_compression_settings(void)
 	// Get the memory usage. Note that if --format=raw was used,
 	// we can be decompressing.
 	const uint64_t memory_limit = hardware_memlimit_get(opt_mode);
-	uint64_t memory_usage;
+	uint64_t memory_usage = UINT64_MAX;
 	if (opt_mode == MODE_COMPRESS) {
-#ifdef MYTHREAD_ENABLED
+#ifdef HAVE_ENCODERS
+#	ifdef MYTHREAD_ENABLED
 		if (opt_format == FORMAT_XZ && hardware_threads_get() > 1) {
 			mt_options.threads = hardware_threads_get();
 			mt_options.block_size = opt_block_size;
@@ -235,12 +236,15 @@ coder_set_compression_settings(void)
 						" threads."),
 						mt_options.threads);
 		} else
-#endif
+#	endif
 		{
 			memory_usage = lzma_raw_encoder_memusage(filters);
 		}
+#endif
 	} else {
+#ifdef HAVE_DECODERS
 		memory_usage = lzma_raw_decoder_memusage(filters);
+#endif
 	}
 
 	if (memory_usage == UINT64_MAX)
@@ -248,7 +252,11 @@ coder_set_compression_settings(void)
 
 	// Print memory usage info before possible dictionary
 	// size auto-adjusting.
+	//
+	// NOTE: If only encoder support was built, we cannot show the
+	// what the decoder memory usage will be.
 	message_mem_needed(V_DEBUG, memory_usage);
+#ifdef HAVE_DECODERS
 	if (opt_mode == MODE_COMPRESS) {
 		const uint64_t decmem = lzma_raw_decoder_memusage(filters);
 		if (decmem != UINT64_MAX)
@@ -256,6 +264,7 @@ coder_set_compression_settings(void)
 					"%s MiB of memory."), uint64_to_str(
 						round_up_to_mib(decmem), 0));
 	}
+#endif
 
 	if (memory_usage <= memory_limit)
 		return;
@@ -268,7 +277,8 @@ coder_set_compression_settings(void)
 
 	assert(opt_mode == MODE_COMPRESS);
 
-#ifdef MYTHREAD_ENABLED
+#ifdef HAVE_ENCODERS
+#	ifdef MYTHREAD_ENABLED
 	if (opt_format == FORMAT_XZ && mt_options.threads > 1) {
 		// Try to reduce the number of threads before
 		// adjusting the compression settings down.
@@ -295,7 +305,7 @@ coder_set_compression_settings(void)
 			uint64_to_str(round_up_to_mib(
 				memory_limit), 2));
 	}
-#endif
+#	endif
 
 	if (memory_usage <= memory_limit)
 		return;
@@ -349,11 +359,13 @@ coder_set_compression_settings(void)
 			uint64_to_str(orig_dict_size >> 20, 0),
 			uint64_to_str(opt->dict_size >> 20, 1),
 			uint64_to_str(round_up_to_mib(memory_limit), 2));
+#endif
 
 	return;
 }
 
 
+#ifdef HAVE_DECODERS
 /// Return true if the data in in_buf seems to be in the .xz format.
 static bool
 is_format_xz(void)
@@ -411,6 +423,7 @@ is_format_lzma(void)
 
 	return true;
 }
+#endif
 
 
 /// Detect the input file type (for now, this done only when decompressing),
@@ -424,6 +437,7 @@ coder_init(file_pair *pair)
 	lzma_ret ret = LZMA_PROG_ERROR;
 
 	if (opt_mode == MODE_COMPRESS) {
+#ifdef HAVE_ENCODERS
 		switch (opt_format) {
 		case FORMAT_AUTO:
 			// args.c ensures this.
@@ -431,12 +445,12 @@ coder_init(file_pair *pair)
 			break;
 
 		case FORMAT_XZ:
-#ifdef MYTHREAD_ENABLED
+#	ifdef MYTHREAD_ENABLED
 			if (hardware_threads_get() > 1)
 				ret = lzma_stream_encoder_mt(
 						&strm, &mt_options);
 			else
-#endif
+#	endif
 				ret = lzma_stream_encoder(
 						&strm, filters, check);
 			break;
@@ -449,7 +463,9 @@ coder_init(file_pair *pair)
 			ret = lzma_raw_encoder(&strm, filters);
 			break;
 		}
+#endif
 	} else {
+#ifdef HAVE_DECODERS
 		uint32_t flags = 0;
 
 		// It seems silly to warn about unsupported check if the
@@ -531,6 +547,7 @@ coder_init(file_pair *pair)
 			strm.avail_out = 0;
 			ret = lzma_code(&strm, LZMA_RUN);
 		}
+#endif
 	}
 
 	if (ret != LZMA_OK) {

src/xz/file_io.c

@@ -23,10 +23,20 @@ static bool warn_fchown;
 
 #if defined(HAVE_FUTIMES) || defined(HAVE_FUTIMESAT) || defined(HAVE_UTIMES)
 #	include <sys/time.h>
+#elif defined(HAVE__FUTIME)
+#	include <sys/utime.h>
 #elif defined(HAVE_UTIME)
 #	include <utime.h>
 #endif
 
+#ifdef HAVE_CAPSICUM
+#	ifdef HAVE_SYS_CAPSICUM_H
+#		include <sys/capsicum.h>
+#	else
+#		include <sys/capability.h>
+#	endif
+#endif
+
 #include "tuklib_open_stdxxx.h"
 
 #ifndef O_BINARY
@@ -37,6 +47,14 @@ static bool warn_fchown;
 #	define O_NOCTTY 0
 #endif
 
+// Using this macro to silence a warning from gcc -Wlogical-op.
+#if EAGAIN == EWOULDBLOCK
+#	define IS_EAGAIN_OR_EWOULDBLOCK(e) ((e) == EAGAIN)
+#else
+#	define IS_EAGAIN_OR_EWOULDBLOCK(e) \
+		((e) == EAGAIN || (e) == EWOULDBLOCK)
+#endif
+
 
 typedef enum {
 	IO_WAIT_MORE,    // Reading or writing is possible.
@@ -48,6 +66,11 @@ typedef enum {
 /// If true, try to create sparse files when decompressing.
 static bool try_sparse = true;
 
+#ifdef ENABLE_SANDBOX
+/// True if the conditions for sandboxing (described in main()) have been met.
+static bool sandbox_allowed = false;
+#endif
+
 #ifndef TUKLIB_DOSLIKE
 /// File status flags of standard input. This is used by io_open_src()
 /// and io_close_src().
@@ -132,6 +155,73 @@ io_no_sparse(void)
 }
 
 
+#ifdef ENABLE_SANDBOX
+extern void
+io_allow_sandbox(void)
+{
+	sandbox_allowed = true;
+	return;
+}
+
+
+/// Enables operating-system-specific sandbox if it is possible.
+/// src_fd is the file descriptor of the input file.
+static void
+io_sandbox_enter(int src_fd)
+{
+	if (!sandbox_allowed) {
+		message(V_DEBUG, _("Sandbox is disabled due "
+				"to incompatible command line arguments"));
+		return;
+	}
+
+	const char dummy_str[] = "x";
+
+	// Try to ensure that both libc and xz locale files have been
+	// loaded when NLS is enabled.
+	snprintf(NULL, 0, "%s%s", _(dummy_str), strerror(EINVAL));
+
+	// Try to ensure that iconv data files needed for handling multibyte
+	// characters have been loaded. This is needed at least with glibc.
+	tuklib_mbstr_width(dummy_str, NULL);
+
+#ifdef HAVE_CAPSICUM
+	// Capsicum needs FreeBSD 10.0 or later.
+	cap_rights_t rights;
+
+	if (cap_rights_limit(src_fd, cap_rights_init(&rights,
+			CAP_EVENT, CAP_FCNTL, CAP_LOOKUP, CAP_READ, CAP_SEEK)))
+		goto error;
+
+	if (cap_rights_limit(STDOUT_FILENO, cap_rights_init(&rights,
+			CAP_EVENT, CAP_FCNTL, CAP_FSTAT, CAP_LOOKUP,
+			CAP_WRITE, CAP_SEEK)))
+		goto error;
+
+	if (cap_rights_limit(user_abort_pipe[0], cap_rights_init(&rights,
+			CAP_EVENT)))
+		goto error;
+
+	if (cap_rights_limit(user_abort_pipe[1], cap_rights_init(&rights,
+			CAP_WRITE)))
+		goto error;
+
+	if (cap_enter())
+		goto error;
+
+#else
+#	error ENABLE_SANDBOX is defined but no sandboxing method was found.
+#endif
+
+	message(V_DEBUG, _("Sandbox was successfully enabled"));
+	return;
+
+error:
+	message(V_DEBUG, _("Failed to enable the sandbox"));
+}
+#endif // ENABLE_SANDBOX
+
+
 #ifndef TUKLIB_DOSLIKE
 /// \brief      Waits for input or output to become available or for a signal
 ///
@@ -369,6 +459,22 @@ io_copy_attrs(const file_pair *pair)
 	(void)utimes(pair->dest_name, tv);
 #	endif
 
+#elif defined(HAVE__FUTIME)
+	// Use one-second precision with Windows-specific _futime().
+	// We could use utime() too except that for some reason the
+	// timestamp will get reset at close(). With _futime() it works.
+	// This struct cannot be const as _futime() takes a non-const pointer.
+	struct _utimbuf buf = {
+		.actime = pair->src_st.st_atime,
+		.modtime = pair->src_st.st_mtime,
+	};
+
+	// Avoid warnings.
+	(void)atime_nsec;
+	(void)mtime_nsec;
+
+	(void)_futime(pair->dest_fd, &buf);
+
 #elif defined(HAVE_UTIME)
 	// Use one-second precision. utime() doesn't support using file
 	// descriptor either. Some systems have broken utime() prototype
@@ -419,7 +525,10 @@ io_open_src_real(file_pair *pair)
 #endif
 #ifdef HAVE_POSIX_FADVISE
 		// It will fail if stdin is a pipe and that's fine.
-		(void)posix_fadvise(STDIN_FILENO, 0, 0, POSIX_FADV_SEQUENTIAL);
+		(void)posix_fadvise(STDIN_FILENO, 0, 0,
+				opt_mode == MODE_LIST
+					? POSIX_FADV_RANDOM
+					: POSIX_FADV_SEQUENTIAL);
 #endif
 		return false;
 	}
@@ -610,7 +719,10 @@ io_open_src_real(file_pair *pair)
 
 #ifdef HAVE_POSIX_FADVISE
 	// It will fail with some special files like FIFOs but that is fine.
-	(void)posix_fadvise(pair->src_fd, 0, 0, POSIX_FADV_SEQUENTIAL);
+	(void)posix_fadvise(pair->src_fd, 0, 0,
+			opt_mode == MODE_LIST
+				? POSIX_FADV_RANDOM
+				: POSIX_FADV_SEQUENTIAL);
 #endif
 
 	return false;
@@ -649,6 +761,11 @@ io_open_src(const char *src_name)
 	const bool error = io_open_src_real(&pair);
 	signals_unblock();
 
+#ifdef ENABLE_SANDBOX
+	if (!error)
+		io_sandbox_enter(pair.src_fd);
+#endif
+
 	return error ? NULL : &pair;
 }
 
@@ -675,23 +792,22 @@ io_close_src(file_pair *pair, bool success)
 #endif
 
 	if (pair->src_fd != STDIN_FILENO && pair->src_fd != -1) {
-#ifdef TUKLIB_DOSLIKE
-		(void)close(pair->src_fd);
-#endif
-
-		// If we are going to unlink(), do it before closing the file.
-		// This way there's no risk that someone replaces the file and
-		// happens to get same inode number, which would make us
-		// unlink() wrong file.
+		// Close the file before possibly unlinking it. On DOS-like
+		// systems this is always required since unlinking will fail
+		// if the file is open. On POSIX systems it usually works
+		// to unlink open files, but in some cases it doesn't and
+		// one gets EBUSY in errno.
 		//
-		// NOTE: DOS-like systems are an exception to this, because
-		// they don't allow unlinking files that are open. *sigh*
+		// xz 5.2.2 and older unlinked the file before closing it
+		// (except on DOS-like systems). The old code didn't handle
+		// EBUSY and could fail e.g. on some CIFS shares. The
+		// advantage of unlinking before closing is negligible
+		// (avoids a race between close() and stat()/lstat() and
+		// unlink()), so let's keep this simple.
+		(void)close(pair->src_fd);
+
 		if (success && !opt_keep_original)
 			io_unlink(pair->src_name, &pair->src_st);
-
-#ifndef TUKLIB_DOSLIKE
-		(void)close(pair->src_fd);
-#endif
 	}
 
 	return;
@@ -1018,7 +1134,7 @@ io_read(file_pair *pair, io_buf *buf_union, size_t size)
 			}
 
 #ifndef TUKLIB_DOSLIKE
-			if (errno == EAGAIN || errno == EWOULDBLOCK) {
+			if (IS_EAGAIN_OR_EWOULDBLOCK(errno)) {
 				const io_wait_ret ret = io_wait(pair,
 						mytime_get_flush_timeout(),
 						true);
@@ -1106,7 +1222,7 @@ io_write_buf(file_pair *pair, const uint8_t *buf, size_t size)
 			}
 
 #ifndef TUKLIB_DOSLIKE
-			if (errno == EAGAIN || errno == EWOULDBLOCK) {
+			if (IS_EAGAIN_OR_EWOULDBLOCK(errno)) {
 				if (io_wait(pair, -1, false) == IO_WAIT_MORE)
 					continue;
 

src/xz/file_io.h

@@ -80,6 +80,12 @@ extern void io_write_to_user_abort_pipe(void);
 extern void io_no_sparse(void);
 
 
+#ifdef ENABLE_SANDBOX
+/// \brief      main() calls this if conditions for sandboxing have been met.
+extern void io_allow_sandbox(void);
+#endif
+
+
 /// \brief      Open the source file
 extern file_pair *io_open_src(const char *src_name);
 

src/xz/list.c

@@ -109,7 +109,7 @@ static struct {
 	uint32_t checks;
 	uint32_t min_version;
 	bool all_have_sizes;
-} totals = { 0, 0, 0, 0, 0, 0, 0, 0, 0, true };
+} totals = { 0, 0, 0, 0, 0, 0, 0, 0, 50000002, true };
 
 
 /// Convert XZ Utils version number to a string.
@@ -484,6 +484,8 @@ parse_block_header(file_pair *pair, const lzma_index_iter *iter,
 		// If the above fails, the file is corrupt so
 		// LZMA_DATA_ERROR is a good error code.
 
+	// Fall through
+
 	case LZMA_DATA_ERROR:
 		// Free the memory allocated by lzma_block_header_decode().
 		for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i)
@@ -636,7 +638,11 @@ static void
 get_check_names(char buf[CHECKS_STR_SIZE],
 		uint32_t checks, bool space_after_comma)
 {
-	assert(checks != 0);
+	// If we get called when there are no Checks to print, set checks
+	// to 1 so that we print "None". This can happen in the robot mode
+	// when printing the totals line if there are no valid input files.
+	if (checks == 0)
+		checks = 1;
 
 	char *pos = buf;
 	size_t left = CHECKS_STR_SIZE;

src/xz/main.c

@@ -205,10 +205,31 @@ main(int argc, char **argv)
 	if (opt_mode != MODE_LIST)
 		signals_init();
 
+#ifdef ENABLE_SANDBOX
+	// Set a flag that sandboxing is allowed if all these are true:
+	//   - --files or --files0 wasn't used.
+	//   - There is exactly one input file or we are reading from stdin.
+	//   - We won't create any files: output goes to stdout or --test
+	//     or --list was used. Note that --test implies opt_stdout = true
+	//     but --list doesn't.
+	//
+	// This is obviously not ideal but it was easy to implement and
+	// it covers the most common use cases.
+	//
+	// TODO: Make sandboxing work for other situations too.
+	if (args.files_name == NULL && args.arg_count == 1
+			&& (opt_stdout || strcmp("-", args.arg_names[0]) == 0
+				|| opt_mode == MODE_LIST))
+		io_allow_sandbox();
+#endif
+
 	// coder_run() handles compression, decompression, and testing.
 	// list_file() is for --list.
-	void (*run)(const char *filename) = opt_mode == MODE_LIST
-			 ? &list_file : &coder_run;
+	void (*run)(const char *filename) = &coder_run;
+#ifdef HAVE_DECODERS
+	if (opt_mode == MODE_LIST)
+		run = &list_file;
+#endif
 
 	// Process the files given on the command line. Note that if no names
 	// were given, args_parse() gave us a fake "-" filename.
@@ -267,6 +288,7 @@ main(int argc, char **argv)
 			(void)fclose(args.files_file);
 	}
 
+#ifdef HAVE_DECODERS
 	// All files have now been handled. If in --list mode, display
 	// the totals before exiting. We don't have signal handlers
 	// enabled in --list mode, so we don't need to check user_abort.
@@ -274,6 +296,7 @@ main(int argc, char **argv)
 		assert(!user_abort);
 		list_totals();
 	}
+#endif
 
 #ifndef NDEBUG
 	coder_free();

src/xz/private.h

@@ -45,6 +45,10 @@
 #	define STDERR_FILENO (fileno(stderr))
 #endif
 
+#ifdef HAVE_CAPSICUM
+#	define ENABLE_SANDBOX 1
+#endif
+
 #include "main.h"
 #include "mytime.h"
 #include "coder.h"
@@ -56,4 +60,7 @@
 #include "signals.h"
 #include "suffix.h"
 #include "util.h"
-#include "list.h"
+
+#ifdef HAVE_DECODERS
+#	include "list.h"
+#endif

src/xz/xz.1

@@ -5,7 +5,7 @@
 .\" This file has been put into the public domain.
 .\" You can do whatever you want with this file.
 .\"
-.TH XZ 1 "2015-05-11" "Tukaani" "XZ Utils"
+.TH XZ 1 "2017-04-19" "Tukaani" "XZ Utils"
 .
 .SH NAME
 xz, unxz, xzcat, lzma, unlzma, lzcat \- Compress or decompress .xz and .lzma files
@@ -2779,8 +2779,8 @@ have the same number of bytes per pixel.
 .BR bzip2 (1),
 .BR 7z (1)
 .PP
-XZ Utils: <http://tukaani.org/xz/>
+XZ Utils: <https://tukaani.org/xz/>
 .br
-XZ Embedded: <http://tukaani.org/xz/embedded.html>
+XZ Embedded: <https://tukaani.org/xz/embedded.html>
 .br
 LZMA SDK: <http://7-zip.org/sdk.html>

src/xzdec/xzdec.1

@@ -4,7 +4,7 @@
 .\" This file has been put into the public domain.
 .\" You can do whatever you want with this file.
 .\"
-.TH XZDEC 1 "2013-06-30" "Tukaani" "XZ Utils"
+.TH XZDEC 1 "2017-04-19" "Tukaani" "XZ Utils"
 .SH NAME
 xzdec, lzmadec \- Small .xz and .lzma decompressors
 .SH SYNOPSIS
@@ -143,4 +143,4 @@ decompressor, consider using XZ Embedded.
 .SH "SEE ALSO"
 .BR xz (1)
 .PP
-XZ Embedded: <http://tukaani.org/xz/embedded.html>
+XZ Embedded: <https://tukaani.org/xz/embedded.html>

tests/test_index.c

@@ -630,6 +630,22 @@ test_corrupt(void)
 }
 
 
+// Allocator that succeeds for the first two allocation but fails the rest.
+static void *
+my_alloc(void *opaque, size_t a, size_t b)
+{
+	(void)opaque;
+
+	static unsigned count = 0;
+	if (++count > 2)
+		return NULL;
+
+	return malloc(a * b);
+}
+
+static const lzma_allocator my_allocator = { &my_alloc, NULL, NULL };
+
+
 int
 main(void)
 {
@@ -655,5 +671,19 @@ main(void)
 
 	test_corrupt();
 
+	// Test for the bug fix 21515d79d778b8730a434f151b07202d52a04611:
+	// liblzma: Fix lzma_index_dup() for empty Streams.
+	i = create_empty();
+	expect(lzma_index_stream_padding(i, 4) == LZMA_OK);
+	test_copy(i);
+	lzma_index_end(i, NULL);
+
+	// Test for the bug fix 3bf857edfef51374f6f3fffae3d817f57d3264a0:
+	// liblzma: Fix a memory leak in error path of lzma_index_dup().
+	// Use Valgrind to see that there are no leaks.
+	i = create_small();
+	expect(lzma_index_dup(i, &my_allocator) == NULL);
+	lzma_index_end(i, NULL);
+
 	return 0;
 }

windows/README-Windows.txt

@@ -7,7 +7,7 @@ Introduction
 
     This package includes command line tools (xz.exe and a few others)
     and the liblzma compression library from XZ Utils. You can find the
-    latest version and full source code from <http://tukaani.org/xz/>.
+    latest version and full source code from <https://tukaani.org/xz/>.
 
     The parts of the XZ Utils source code, that are relevant to this
     binary package, are in the public domain. XZ Utils have been built

windows/liblzma_dll.vcxproj

@@ -1,383 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="ReleaseMT|Win32">
-      <Configuration>ReleaseMT</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="ReleaseMT|x64">
-      <Configuration>ReleaseMT</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}</ProjectGuid>
-    <Keyword>Win32Proj</Keyword>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-    <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
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-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
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-  <ImportGroup Label="ExtensionSettings">
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windows/vs2013/config.h

@@ -15,6 +15,9 @@
 /* Define to 1 if sha256 integrity check is enabled. */
 #define HAVE_CHECK_SHA256 1
 
+/* Define to 1 if any of HAVE_DECODER_foo have been defined. */
+#define HAVE_DECODERS 1
+
 /* Define to 1 if arm decoder is enabled. */
 #define HAVE_DECODER_ARM 1
 
@@ -42,6 +45,9 @@
 /* Define to 1 if x86 decoder is enabled. */
 #define HAVE_DECODER_X86 1
 
+/* Define to 1 if any of HAVE_ENCODER_foo have been defined. */
+#define HAVE_ENCODERS 1
+
 /* Define to 1 if arm encoder is enabled. */
 #define HAVE_ENCODER_ARM 1
 
@@ -128,7 +134,7 @@
 #define PACKAGE_NAME "XZ Utils"
 
 /* Define to the home page for this package. */
-#define PACKAGE_URL "http://tukaani.org/xz/"
+#define PACKAGE_URL "https://tukaani.org/xz/"
 
 /* The size of `size_t', as computed by sizeof. */
 #ifdef _WIN64

windows/vs2013/liblzma.vcxproj

@@ -120,7 +120,7 @@
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+      <AdditionalIncludeDirectories>./;../../src/liblzma/common;../../src/common;../../src/liblzma/api;../../src/liblzma/check;../../src/liblzma/delta;../../src/liblzma/lz;../../src/liblzma/lzma;../../src/liblzma/rangecoder;../../src/liblzma/simple</AdditionalIncludeDirectories>
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       <Optimization>Disabled</Optimization>
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+      <AdditionalIncludeDirectories>./;../../src/liblzma/common;../../src/common;../../src/liblzma/api;../../src/liblzma/check;../../src/liblzma/delta;../../src/liblzma/lz;../../src/liblzma/lzma;../../src/liblzma/rangecoder;../../src/liblzma/simple</AdditionalIncludeDirectories>
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@@ -148,7 +148,7 @@
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       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
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+      <AdditionalIncludeDirectories>./;../../src/liblzma/common;../../src/common;../../src/liblzma/api;../../src/liblzma/check;../../src/liblzma/delta;../../src/liblzma/lz;../../src/liblzma/lzma;../../src/liblzma/rangecoder;../../src/liblzma/simple</AdditionalIncludeDirectories>
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@@ -164,7 +164,7 @@
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+      <AdditionalIncludeDirectories>./;../../src/liblzma/common;../../src/common;../../src/liblzma/api;../../src/liblzma/check;../../src/liblzma/delta;../../src/liblzma/lz;../../src/liblzma/lzma;../../src/liblzma/rangecoder;../../src/liblzma/simple</AdditionalIncludeDirectories>
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+      <AdditionalIncludeDirectories>./;../../src/liblzma/common;../../src/common;../../src/liblzma/api;../../src/liblzma/check;../../src/liblzma/delta;../../src/liblzma/lz;../../src/liblzma/lzma;../../src/liblzma/rangecoder;../../src/liblzma/simple</AdditionalIncludeDirectories>
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       <WarningLevel>Level3</WarningLevel>
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+      <AdditionalIncludeDirectories>./;../../src/liblzma/common;../../src/common;../../src/liblzma/api;../../src/liblzma/check;../../src/liblzma/delta;../../src/liblzma/lz;../../src/liblzma/lzma;../../src/liblzma/rangecoder;../../src/liblzma/simple</AdditionalIncludeDirectories>
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windows/vs2017/config.h

@@ -0,0 +1,148 @@
+/* config.h for compiling liblzma (*not* the whole XZ Utils) with MSVC 2017 */
+
+/* Prefix for symbols exported by tuklib_*.c files */
+#define TUKLIB_SYMBOL_PREFIX lzma_
+
+/* How many MiB of RAM to assume if the real amount cannot be determined. */
+#define ASSUME_RAM 128
+
+/* Define to 1 if crc32 integrity check is enabled. */
+#define HAVE_CHECK_CRC32 1
+
+/* Define to 1 if crc64 integrity check is enabled. */
+#define HAVE_CHECK_CRC64 1
+
+/* Define to 1 if sha256 integrity check is enabled. */
+#define HAVE_CHECK_SHA256 1
+
+/* Define to 1 if any of HAVE_DECODER_foo have been defined. */
+#define HAVE_DECODERS 1
+
+/* Define to 1 if arm decoder is enabled. */
+#define HAVE_DECODER_ARM 1
+
+/* Define to 1 if armthumb decoder is enabled. */
+#define HAVE_DECODER_ARMTHUMB 1
+
+/* Define to 1 if delta decoder is enabled. */
+#define HAVE_DECODER_DELTA 1
+
+/* Define to 1 if ia64 decoder is enabled. */
+#define HAVE_DECODER_IA64 1
+
+/* Define to 1 if lzma1 decoder is enabled. */
+#define HAVE_DECODER_LZMA1 1
+
+/* Define to 1 if lzma2 decoder is enabled. */
+#define HAVE_DECODER_LZMA2 1
+
+/* Define to 1 if powerpc decoder is enabled. */
+#define HAVE_DECODER_POWERPC 1
+
+/* Define to 1 if sparc decoder is enabled. */
+#define HAVE_DECODER_SPARC 1
+
+/* Define to 1 if x86 decoder is enabled. */
+#define HAVE_DECODER_X86 1
+
+/* Define to 1 if any of HAVE_ENCODER_foo have been defined. */
+#define HAVE_ENCODERS 1
+
+/* Define to 1 if arm encoder is enabled. */
+#define HAVE_ENCODER_ARM 1
+
+/* Define to 1 if armthumb encoder is enabled. */
+#define HAVE_ENCODER_ARMTHUMB 1
+
+/* Define to 1 if delta encoder is enabled. */
+#define HAVE_ENCODER_DELTA 1
+
+/* Define to 1 if ia64 encoder is enabled. */
+#define HAVE_ENCODER_IA64 1
+
+/* Define to 1 if lzma1 encoder is enabled. */
+#define HAVE_ENCODER_LZMA1 1
+
+/* Define to 1 if lzma2 encoder is enabled. */
+#define HAVE_ENCODER_LZMA2 1
+
+/* Define to 1 if powerpc encoder is enabled. */
+#define HAVE_ENCODER_POWERPC 1
+
+/* Define to 1 if sparc encoder is enabled. */
+#define HAVE_ENCODER_SPARC 1
+
+/* Define to 1 if x86 encoder is enabled. */
+#define HAVE_ENCODER_X86 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* Define to 1 to enable bt2 match finder. */
+#define HAVE_MF_BT2 1
+
+/* Define to 1 to enable bt3 match finder. */
+#define HAVE_MF_BT3 1
+
+/* Define to 1 to enable bt4 match finder. */
+#define HAVE_MF_BT4 1
+
+/* Define to 1 to enable hc3 match finder. */
+#define HAVE_MF_HC3 1
+
+/* Define to 1 to enable hc4 match finder. */
+#define HAVE_MF_HC4 1
+
+/* Define to 1 if stdbool.h conforms to C99. */
+#define HAVE_STDBOOL_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 or 0, depending whether the compiler supports simple visibility
+   declarations. */
+#define HAVE_VISIBILITY 0
+
+/* Define to 1 if the system has the type `_Bool'. */
+#define HAVE__BOOL 1
+
+#ifdef _M_IX86
+/* Define to 1 when using Windows 95 (and thus XP) compatible threads. This
+   avoids use of features that were added in Windows Vista.
+   This is used for 32-bit x86 builds for compatibility reasons since it
+   makes no measurable difference in performance compared to Vista threads. */
+#define MYTHREAD_WIN95 1
+#else
+/* Define to 1 when using Windows Vista compatible threads. This uses features
+   that are not available on Windows XP. */
+#define MYTHREAD_VISTA 1
+#endif
+
+/* Define to 1 to disable debugging code. */
+#define NDEBUG 1
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "XZ Utils"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL "https://tukaani.org/xz/"
+
+/* The size of `size_t', as computed by sizeof. */
+#ifdef _WIN64
+#define SIZEOF_SIZE_T 8
+#else
+#define SIZEOF_SIZE_T 4
+#endif
+
+/* Define to 1 if the system supports fast unaligned access to 16-bit and
+   32-bit integers. */
+#define TUKLIB_FAST_UNALIGNED_ACCESS 1

windows/vs2017/liblzma.vcxproj

@@ -0,0 +1,355 @@
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+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseMT|Win32">
+      <Configuration>ReleaseMT</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseMT|x64">
+      <Configuration>ReleaseMT</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
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+		{12728250-16EC-4DC6-94D7-E21DD88947F8}.Release|x64.Build.0 = Release|x64
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+		{12728250-16EC-4DC6-94D7-E21DD88947F8}.ReleaseMT|Win32.Build.0 = ReleaseMT|Win32
+		{12728250-16EC-4DC6-94D7-E21DD88947F8}.ReleaseMT|x64.ActiveCfg = ReleaseMT|x64
+		{12728250-16EC-4DC6-94D7-E21DD88947F8}.ReleaseMT|x64.Build.0 = ReleaseMT|x64
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Debug|Win32.ActiveCfg = Debug|Win32
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Debug|Win32.Build.0 = Debug|Win32
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Debug|x64.ActiveCfg = Debug|x64
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Debug|x64.Build.0 = Debug|x64
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Release|Win32.ActiveCfg = Release|Win32
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Release|Win32.Build.0 = Release|Win32
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Release|x64.ActiveCfg = Release|x64
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.Release|x64.Build.0 = Release|x64
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.ReleaseMT|Win32.ActiveCfg = ReleaseMT|Win32
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.ReleaseMT|Win32.Build.0 = ReleaseMT|Win32
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.ReleaseMT|x64.ActiveCfg = ReleaseMT|x64
+		{E0F247DB-EF12-4755-8DF9-F74BCD1348F7}.ReleaseMT|x64.Build.0 = ReleaseMT|x64
+	EndGlobalSection
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+	EndGlobalSection
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